Filing taxes - TT says the TIN on my one 1099 is invalid, and therefore will not e-file. Of course, TT told me this after I paid for two state tax return filings for $25/pop. TIN format is XX-XXXXXXX. 9 digits, as it's supposed to be. I google this client's TIN and Google verifies, same answer. I am trying to contact the client to verify TIN, but I'm sure what the answer will be. What does TT not like about this genuine number? How do I work around this so I can e-file. Amazing product until it refuses to do something & doesn't give you a clue how to fix it. Best course of action is to Ask the Community. Unfortunately, no one is answering.