Best Professional Tax Software - Page 2

How Many Professional Tax Software Products Does G2 Track?

Total Products under this Category: 152

Category Stats (Nov 2026)

  • Average Rating: 4.66/5 (↑0.01 vs Oct 2026) The average rating of products in this category, based on all submitted ratings
  • Top Trending Product: Intuit ProSeries Tax (+0.26%) - Among all products in this category, Intuit ProSeries Tax recorded the largest rating increase compared to last month

Last updated: November 10, 2026

How Does G2 Rank Professional Tax Software Products?

Why You Can Trust G2's Software Rankings:

  • 30 Analysts and Data Experts
  • 1,400+ Authentic Reviews
  • 152+ Products
  • Unbiased Rankings

G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category.

G2 Grid® for Professional Tax Software

G2 Grid® for Professional Tax Software plotting products by satisfaction and market presence

Highlighted products: Intuit Lacerte Tax, Intuit ProConnect Tax, Intuit ProSeries Tax, DualEntry, UltraTax CS, CCH ProSystem fx Tax, and Juno Tax.

Underlying data: [Grid® JSON](https://www.g2.com/categories/professional-tax/grids.json?focus%5B%5D=intuit-lacerte-tax&focus%5B%5D=intuit-proconnect-tax&focus%5B%5D=intuit-proseries-tax&focus%5B%5D=dualentry&focus%5B%5D=ultratax-cs&focus%5B%5D=cch-prosystem-fx-tax&focus%5B%5D=juno-tax)

Feather

Feather is a professional-class AI tax assistant purpose-built for CPAs, EAs and tax attorneys. Feather units three core pillars, Research, Analyze, and Apply into one seamlessly integrated environment. Research: Ask complex federal or state tax questions and receive detailed, citation-backed answers grounded in primary tax authority, including the IRC, Treasury Regulations, IRS guidance, Tax Court opinions, and state tax codes. Every answer includes audit-ready citations so professionals can review the underlying authority. Analyze: Securely gather and analyze client documents through Feather's §7216 compliant document workspace, The Safe. Professionals can interact with client files to extract information, identify risks and planning opportunities, and generate client-ready or audit-ready work. Apply: Bridge primary-source research and client data directly into tax engagement workflows. Feather enables practitioners to construct defensible tax positions, execute comprehensive tax reviews, and verify IRS forms for full compliance across all engagement types.

Average Rating: 5.0/5.0

Total Reviews: 2

Who Is the Company Behind Feather?

Who Uses This Product?

  • Company Size: 50% Medium, 50% Small

What Are Recent G2 Reviews of Feather?

PlainDot

Plain Dot e-files Form 1099-NEC and 1099-MISC through the IRS IRIS system, under Plain Dot's own Transmitter Control Code, so you don't need a TCC. Upload a spreadsheet or type returns in, and we file them with the IRS and with the states that need them. We can mail recipient copies too, with tracking if you want it. Plain Dot also checks names and TINs with the IRS before you file: one at a time in seconds, or up to 10,000 in one spreadsheet. Fewer mismatches means fewer CP2100 notices and less backup withholding. Pricing is per return and per TIN check, paid from a prepaid balance. Starter has no plan fee. Built for small businesses, accounting firms, bookkeepers, tax preparers and accounts payable teams.

Average Rating: 5.0/5.0

Total Reviews: 2

Who Is the Company Behind PlainDot?

Who Uses This Product?

  • Company Size: 100% Medium

What Are Recent G2 Reviews of PlainDot?

Tax Stack AI

Tax Stack AI is an AI-powered SaaS solution designed to help small-sized accounting firms streamline tax research, analyze financial documents and tax returns, and manage client insights. The platform centralizes key accounting workflows into a single interface, allowing users to process data, review client information, and generate insights efficiently. It is designed for firms and solo practitioners who need practical, AI-based tools without the complexity or high cost of enterprise-level software. The platform combines artificial intelligence with accounting-specific functionality. It sources information from authoritative tax references that are reviewed by CPAs, applies AI to client data, and analyzes uploaded documents to produce actionable outputs. Tax Stack AI is intended to reduce manual workload, improve accuracy, and support advisory services by providing organized and relevant information. Key Features: Tax chatbot: Responds to tax research queries using authoritative sources, delivering consistent and accurate information. Client insights and management tools: Tracks client activity, identifies patterns, and provides context-specific analysis for planning and advisory purposes. Client-specific chatbot: Learns from documents and inputs related to individual clients, providing tailored guidance and responses. General chatbot: Pulls from authoritative sources and provides linked citations for proper due diligence. Document analysis: Automatically reviews tax returns, financial statements, and other documents for errors, inconsistencies, and actionable recommendations. Integrated interface: Combines multiple accounting functions into one platform, enabling easier workflow management. Benefits and Value: Reduces the time required for manual tax research and document review. Supports data accuracy by cross-referencing with authoritative sources and performing automated checks. Centralizes multiple accounting tasks, reducing software complexity and streamlining operations. Designed specifically for small-sized firms and solo practitioners, avoiding unnecessary features and costs associated with larger enterprise platforms. Facilitates more informed decision-making for tax planning and client advisory. Tax Stack AI is structured to assist firms in incorporating AI into their operations in a practical and scalable way. By providing tools for research, document review, and client management, the platform supports efficient workflows, consistent outputs, and better access to relevant information. Users can focus on analyzing results and delivering advice rather than performing repetitive, time-consuming tasks. Overall, Tax Stack AI offers a centralized, AI-driven approach to accounting for small -sized firms. Its combination of tax research, document analysis, and client insight tools provides a framework for improving operational efficiency, maintaining accuracy, and supporting more targeted advisory services. The platform is built to meet the specific needs of smaller accounting practices, offering AI capabilities in a cost-effective and accessible manner.

Average Rating: 5.0/5.0

Total Reviews: 4

Who Is the Company Behind Tax Stack AI?

Who Uses This Product?

  • Company Size: 100% Small

What Do G2 Reviewers Say About Tax Stack AI?

AI-generated summary from verified user reviews

Pros
  • Users find Tax Stack AI incredibly easy to use, making daily workflows simpler and more efficient.
  • Users find Tax Stack AI's efficiency improvements invaluable, drastically reducing research time and enhancing client insights.
  • Users value the client management tools of Tax Stack AI, enhancing insights and prioritizing client needs effectively.
  • Users praise the responsive customer support of Tax Stack AI, ensuring timely assistance for smooth operations.
  • Users value the streamlined task management of Tax Stack AI, enhancing efficiency and client insight significantly.
Cons
  • Users desire more advanced settings for tailored document analysis and enhanced client insights for tax planning.
  • Users find the limited integrations inconvenient, preferring direct access to client documents from the cloud.
  • Users desire more limited templates for tailored document analysis and client insights to enhance tax planning.
  • Users find Tax Stack AI to be not user-friendly, citing unintuitive design and an overload of text in responses.
  • Users find the poor reporting in Tax Stack AI challenging, desiring better visualizations for easier insight digestion.

What Are Recent G2 Reviews of Tax Stack AI?

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TaxZerone

TaxZerone is a tax filing platform built for tax professionals and businesses to easily prepare and e-file IRS business tax forms, including payroll, excise, information returns, and more, with a simple, secure, and efficient filing experience.

Average Rating: 5.0/5.0

Total Reviews: 2

Who Is the Company Behind TaxZerone?

Who Uses This Product?

  • Company Size: 50% Medium, 50% Small

What Are Recent G2 Reviews of TaxZerone?

1099Express

Our Software makes information reporting effortless Our suite of software products covers most information reporting requirements for the IRS and SSA. We offer products for the entire series of 1099 forms including the W2-G, the ACA 1094/1095 B & C, 1042-S and W2 forms. You can print or eFile directly from the programs for no additional charge. These services are built into all our programs and most of our programs support corrections for current and past years. If you have less than 10 forms, you can print onto the IRS red forms and mail them to the IRS for free. If you have a TCC (Transmitter Control Code) you can eFile to the IRS for free. There is no need to purchase special forms since you can print on to plain paper and send to the recipients yourself.

Average Rating: 5.0/5.0

Total Reviews: 1

Who Is the Company Behind 1099Express?

Who Uses This Product?

  • Company Size: 100% Large

What Are Recent G2 Reviews of 1099Express?

Brevitax

Brevitax is tax resolution software that uses AI to automate IRS casework from start to finish. It reads IRS transcripts, applies practitioner rules to choose the resolution path, prepares the forms and work product, manages the case, and checks the outcome against a refreshed transcript. A licensed professional (EA, CPA, or attorney) reviews and approves the work. Tax preparation and accounting firms use Brevitax for tax resolution automation, so they can offer tax relief services without building a resolution department.

Average Rating: 5.0/5.0

Total Reviews: 1

Who Is the Company Behind Brevitax?

Who Uses This Product?

  • Company Size: 100% Small

What Are Recent G2 Reviews of Brevitax?

FiscalFox

FiscalFox is UK capital gains tax software for accounting practices. Firms import supported client broker transaction files into separate client cases, review same-day and 30-day share matching and Section 104 pools, and generate disposal-level workings and SA108 supporting figures. Closing pool balances can be carried into the next tax year. FiscalFox prepares calculations and supporting reports; accountants retain professional review and file the tax return using their existing software.

Average Rating: 5.0/5.0

Total Reviews: 1

Who Is the Company Behind FiscalFox?

Who Uses This Product?

  • Company Size: 100% Small

What Are Recent G2 Reviews of FiscalFox?

heavnn.io

Heavnn.io is a tax-planning and international-setup service aimed primarily at digital nomads, remote workers, and online businesses. In practical terms, it helps people figure out questions like: Where should I be tax resident? Where should I incorporate my company? How will moving between countries affect my personal and business taxes? How can I structure things legally to reduce my overall tax burden? What paperwork, tax filings, company administration, and compliance are needed?

Average Rating: 4.5/5.0

Total Reviews: 1

Who Is the Company Behind heavnn.io?

Who Uses This Product?

  • Company Size: 100% Small

What Are Recent G2 Reviews of heavnn.io?

OLTPRO

OLTPRO is a comprehensive professional tax software designed to maximize the efficiency and profitability of tax preparation businesses. It offers both web-based and desktop solutions, providing flexibility to suit various office setups. With support for unlimited individual and business returns across all states, OLTPRO ensures that tax professionals can handle a diverse client base with ease. The software includes free e-filing, multi-user access, and automatic updates, eliminating the need for manual installations and reducing downtime. Additionally, OLTPRO provides free customer support, ensuring that users have assistance whenever needed. Key Features and Functionality: - Comprehensive Tax Form Support: Handles individual forms such as 1040 and 1040NR, as well as a wide range of business and corporate forms including 1120, 1120S, 1065, 1041, 2290, 990, 720, 709, 706, 5500, 8849, and 8038CP. - Multi-User Access: Facilitates collaboration within tax offices by allowing multiple users to work simultaneously without the need for complex networking setups. - Automatic Updates: Ensures that the software is always up-to-date with the latest tax laws and regulations, reducing the risk of errors and compliance issues. - Document Manager: Enables the scanning and uploading of essential client documents, creating electronic files for clients and providing immediate access to their information for more efficient filing. - Taxpayer Portal: Offers a secure, user-friendly site where clients can view and print tax forms, remotely sign documents, upload tax-related documents, and communicate with preparers in real-time. - e-Signature: Allows taxpayers to sign tax forms electronically without the need for a signature pad, supporting remote signatures and streamlining the signing process. Primary Value and Solutions Provided: OLTPRO addresses the critical needs of tax professionals by offering a reliable and efficient platform that simplifies the tax preparation process. Its comprehensive form support ensures that preparers can handle a wide array of tax situations, while multi-user access and automatic updates enhance operational efficiency. The inclusion of features like the Document Manager and Taxpayer Portal reduces the reliance on paper documents and in-person meetings, facilitating a more streamlined and modern workflow. By providing these tools, OLTPRO helps tax professionals increase productivity, reduce errors, and improve client satisfaction, ultimately contributing to the growth and success of their businesses.

Average Rating: 4.5/5.0

Total Reviews: 1

Who Is the Company Behind OLTPRO?

Who Uses This Product?

  • Company Size: 100% Small

What Are Recent G2 Reviews of OLTPRO?

Sigma Tax Pro

Sigma Tax Pro is a provider of professional tax preparation software solutions designed to empower tax preparers, accountants, and CPAs to enhance their business operations and client satisfaction. Established in 2012 and headquartered in Delray Beach, Florida, Sigma Tax Pro offers a comprehensive suite of software products tailored to meet the diverse needs of tax professionals. Their offerings include software for preparing forms 1040 and 1120, complemented by bank products and exceptional technical support. By leveraging volume discounts, Sigma Tax Pro provides these solutions at competitive prices, enabling tax professionals to maximize revenue and streamline their services. Key Features and Functionality: - Comprehensive Tax Preparation Software: Sigma Tax Pro offers a range of software solutions, including SIGMA 1040-EZ, SIGMA 1040-SR, SIGMA 1040-DR, and SIGMA 1040-TW, catering to various tax preparation needs. - Bank Product Integration: The software integrates with preferred bank product partners, allowing tax professionals to collect preparation fees directly from taxpayers' refunds and offer taxpayer cash advances. - Technical and Tax Preparation Support: Sigma Tax Pro provides best-in-class technical support and tax preparation assistance, ensuring users have the help they need throughout the tax season. - Managed Services: The company offers managed services for bank product offices and e-file offices, enhancing operational efficiency. - Creative Services: Sigma Tax Pro provides co-branding, website design, social media, and brand identity services to help tax professionals establish a strong market presence. Primary Value and Solutions Provided: Sigma Tax Pro's primary value lies in its commitment to delivering cost-effective, professional tax preparation software solutions that enable tax preparers to maximize revenue and increase client satisfaction. By offering comprehensive software options, integrated bank products, and exceptional support services, Sigma Tax Pro addresses the critical needs of tax professionals, helping them streamline their operations, enhance client relationships, and grow their businesses effectively.

Average Rating: 4.5/5.0

Total Reviews: 1

Who Is the Company Behind Sigma Tax Pro?

Who Uses This Product?

  • Company Size: 100% Medium

What Are Recent G2 Reviews of Sigma Tax Pro?

TaxHei

TaxHei is expense tracking software that organizes receipts and generates tax-ready reports through automated scanning, extracting the GST, HST, and QST already itemized on each receipt. Users can search, categorize, and tag transactions, attach multiple images to one entry, or upload multi-page PDFs. Built for solo entrepreneurs and small businesses needing audit-ready records, and for accredited foreign representatives, diplomats, and UN staff in Canada filing sales tax rebate claims, with receipts organized chronologically as required by tax authorities. Pricing is usage-based: receipts are stored year-round for a flat fee, while full audit-ready exports with every receipt image are generated on demand, so customers pay only for the heavy lift when they actually need it. New users get their first 30 receipts free. Reports export as Excel or PDF with receipt images via secure links. Bilingual (English/French-Canadian), role-based access controls, backend audit logging, install PWA.

Average Rating: 4.0/5.0

Total Reviews: 1

Who Is the Company Behind TaxHei?

Who Uses This Product?

  • Company Size: 100% Small

What Are Recent G2 Reviews of TaxHei?

TaxSlayer Pro

TaxSlayer Pro is a comprehensive tax preparation software designed specifically for professional tax preparers. It offers both desktop and cloud-based solutions, enabling users to efficiently prepare and file federal, state, and local tax returns. With over 55 years of experience, TaxSlayer Pro provides a reliable platform that caters to the diverse needs of tax professionals, from small practices to large firms. Key Features and Functionality: - Unlimited 1040 Program: Prepare and file an unlimited number of individual tax returns without additional fees. - Comprehensive Bank Product Solutions: Offer clients refund transfers, allowing them to deduct tax preparation fees directly from their refunds, eliminating out-of-pocket expenses. - TaxesToGo® Mobile App: A secure mobile application that enables clients to submit tax documents and communicate with preparers remotely, streamlining the tax preparation process. - Paperless Office Capabilities: Utilize the Paper Cut document management system to scan, save, and manage client documents digitally, reducing paper usage and enhancing efficiency. - Full Corporate Business Suite: Prepare various business tax returns, including Forms 1120, 1120-S, 1065, 1041, and more, catering to diverse client needs. - Integrated Bank Products: Partner with multiple banks to facilitate faster client refunds and quicker payment processing for preparers. - Unlimited Support: Access year-round technical support in both English and Spanish, ensuring assistance is available whenever needed. Primary Value and Solutions Provided: TaxSlayer Pro addresses the critical needs of professional tax preparers by offering a robust, user-friendly platform that enhances productivity and client satisfaction. Its unlimited filing capability allows preparers to expand their client base without incurring additional costs. The integration of the TaxesToGo® mobile app and paperless office features streamlines document collection and management, reducing turnaround times and improving accuracy. Comprehensive support for various tax forms, including complex business returns, ensures preparers can meet the diverse requirements of their clients. Additionally, the inclusion of bank product solutions provides a seamless financial experience for both preparers and clients, facilitating faster refunds and efficient fee collection. Overall, TaxSlayer Pro empowers tax professionals to deliver high-quality services efficiently and effectively.

Average Rating: 5.0/5.0

Total Reviews: 1

Who Is the Company Behind TaxSlayer Pro?

Who Uses This Product?

  • Company Size: 100% Small

What Are Recent G2 Reviews of TaxSlayer Pro?

AATAX

AATAX is Making Tax Digital for Income Tax (MTD ITSA) software that helps accountants, bookkeepers and tax agents prepare, review and submit quarterly updates and final declarations to HMRC for their sole trader and landlord clients. It is HMRC-recognised and uses HMRC's official MTD APIs. Under MTD for Income Tax, each client in scope needs four quarterly updates and a final declaration every year instead of one Self Assessment return. AATAX gives a practice one workspace for that work: HMRC authorisation, client records, quarterly obligations and a complete audit trail. The workflow has four steps: authorise, collect, review and submit. The practice links its HMRC Agent Services Account and sends each client an authorisation request through HMRC. Clients do not need to log in or learn any software. They reply to email reminders or use a secure upload link. AATAX reads your clients' receipts and statements, and your team reviews and confirms. Reviewers check the figures, resolve flags and sign off, and every change is recorded. Quarterly updates and final declarations go to HMRC from the same place, and the result is shown straight away. Key features: A practice-wide work queue that shows what is due, overdue and next, most urgent first, with background HMRC status checks. A deadlines page across the practice, filterable by team member, with automated email reminders. Full year end, including the HMRC tax calculation, accounting adjustments, capital allowances, loss treatment, final declaration and amendments after filing. Team roles (Practice admin and Accountant) and client assignment. A per-client history of every submission, with HMRC's response and reference. Income coverage includes self-employment, UK property and foreign property, plus other income and reliefs such as employment, savings interest, dividends, partnerships, CIS deductions, capital gains and Gift Aid. Data is handled under UK GDPR, documents are stored encrypted, and AATAX never sees or stores HMRC passwords. Pricing is £5 per client, per year, ex VAT, for up to 500 clients, with no setup fees and no tiers. Sole traders and landlords who do their own MTD can use a separate AATAX app for free.

Who Is the Company Behind AATAX?

Subhransu Sahu
SS
Researched and written by Subhransu Sahu
Updated October 3, 2024