Honestly the monitoring. I had a folder of email subscriptions from the IRS and about fifteen state DORs, and I'd skim them at night and hope I wasn't missing anything. Half of them are formatted badly and you can't tell what's actually a change versus a reminder. Review collected by and hosted on G2.com.

Honestly, I'd still be double-checking it the first year. I don't know yet what it doesn't catch. Until it's been through a full season, it's extra work for me, not less. Review collected by and hosted on G2.com.