Whenever I file my taxes, I mail them in instead of filing electronically. It's getting harder to do this - the software at H&R Block even demands to know WHY you aren't filing electronically. In my case there was a simple and plausible reason - that my wife was not present to sign the joint return.
Anyway, after we both sign it, I send it as Certified Mail, Return Receipt Requested. For decades, the mailing address was the IRS processing center in Atlanta. This year it changed to a PO Box in Charlotte, NC. The check I sent for taxes owed was for more than $1000.00. Today I received the receipt. Look who signed for my return when it got to Charlotte:
This should clear up any questions about where our tax dollars are really going.