I did a partial 401K rollover to a Roth IRA the last week of 2021. I paid estimated tax for this rollover to the IRS online the first week of 2022. I am working on my 2021 taxes with my desktop version of Turbotax and it is saying I have a underpayment penalty, probably because I don't normally make quarterly estimated payments, but I made this one time, end of year rollover. How can I be getting a penalty if I am getting a refund?
