It is probably a rounding error of $1.00 in one of the quarters that make the sum total for the year off. If you used Form 2210AI to report annualized income --basically uneven income throughout the year, or maybe a late year IRA withdrawal, will trigger penalties and it is confusing until you understand the reason for the form. I'd try adding a dollar to one of your quarters and see if that fixes the problem. We users hit TT hard last year about these rounding errors and they haven't fixed it.
