@ 1quentin-rivers5
That thread linked above was from last year and may or may not be the same as your issue. There is a fairly common efile issue that many foreign filers (if applicable) are having this year that is different. The cause and workaround are also different this year depending on the exact error message. Look at your error message in its entirety. You only mentioned the first part. Is there an error code lower down in it?
For instance, are you in a foreign country, and getting one of these similar SMS error messages:
601ERRV:5, CustHdr_17 - ?:? - Invalid SMS Number. Must be between 10 and 10 digits.
or
601ERRV:5, CustHdr_17 - ?:? - Invalid SMS Number. Contains invalid digits.
If so, we can give you the current info on how to correct that and what other foreign filers have had to do to continue to efile.
If that's not your issue, then see if your error message has a different error code you can mention in this thread.
