Thank you for your reply. If I make payment using IRS Direct Pay, how does IRS match the electronic payment to the 1040-X paper return? It appears that it would take up to 16 weeks for IRS to process the paper return. If I mail the 1040-X today, do I wait until I see it shows up in the IRS website "where is my amended return"? If I pay electronically right now, the paper return would not be in system for maybe 16 weeks.
Also, page 18 of the 1040X instructions says "on your payment, put your name, current address, daytime phone number, and SSN....and "Amended 2019 Form 1040". There is not enough room on the check (although the check does show the address) to write all this on the bottom left corner of the check. Do I put this information on a separate blank sheet of paper, or do I have to find room to put all the info on the check itself? Thank you.
