Solved
Filing Extension to avoid Underpayment
I was going to file an extension on ProSeries by 1/15/22 with payment electronically. My thoughts were to make this payment to avoid underpayment penalty ( I didn't do estimates throughout year because December caused underpayment status). ProSeries forms aren't updated for 4868 until February which makes this plan impossible. Is my only other option to mail in an estimate?
