I know that, but the problem is the amounts paid prior to April 15 with the 2020 extension, aren't flowing to the first quarter, but to the second quarter.  The same is true if the overpayment was from 2019 and rolled over a couple of times.  I can NOT find an option to check a box, enter a date, etc. to get the overpayment to go to the first quarter.  That is the problem.