Okay my son owes the feds some money this year, but he doesn't use paper checks. I am doing his taxes for him - no big deal it takes me about five minutes since he's single and taking the standard deduction. I do indeed use paper checks. My plan is to write the IRS a check (as if I were paying my own taxes owed) with his Social Security number and name in the "FOR" section in the lower part of the check. Yes I googled this but didn't get a definite answer that didn't start with "when using Turbo Tax" I'm not using any online program (okay boomer!) I'm just sending in a hard copy printed 1040 using snail mail like I do every year. Normally he gets money back - but this year he owes a bit to the feds, but he gets money back on his state taxes. So to recap - my son will give me the cash next time he visits, and I'll send the IRS a check using my checking account. Has anyone here on wordforge ever done this before? If so, or if you are a tax law expert please help me out here. Thanks!