Arizona charged me an underpayment penalty when TT said I didn't owe one. I paid 143% of my previous (2019) AZ taxes and 136% of the AZ taxes owed for 2020, but I did not pay in equal installments because I did a Roth conversion in late December, 2020. TT had me annualize my income for my federal return on Form 2210, but it did not prompt me to file AZ Form 221. I called AZ Dept of Revenue and they said the penalty was because I did not pay in equal installments and did not file AZ Form 221 to explain why I paid in unequal installments. This sounds like a bug in TT, even though it also sounds like AZ Dept of Revenue is not following their own "safe harbor" estimated tax law. So how can I force TT to let me access AZ Form 221 *AND* help me fill it out? I tried filling it out manually and it is very difficult, plus that would not let me be able to eFile. Thanks for any help.
