Ouch. I'm not sure but I'd look closely at the EIN to be sure there is not an extra dash or a space at the end that might be triggering this error. There might also be some hidden formatting?
On a windows computer, what I'd do is copy the number into notepad (which will remove any hidden formatting and show all the characters of text).... then copy it from notepad back into TT to see if that clears the error. EINs are normally what are on 1099-int so that is not the issue.
Then maybe try not using any dashes?
I hope you are able to work through this TT error soon!
Peace be with you.
(I am not a tax expert)
