I can verify that the field defaults to SSN style numbering. But I just made up a number and it accepted it. Do you have all 9 digits? Both style of tax number are 9 digits, just with the breaks in different places. Type in the digits only, no dashes. Let the program fill in the dashes. If you are using the full 9 digits and the software breaks it up in the wrong way, you can ignore that unless it really is blocking you from filing. If you can't enter the number, post a followup here and I will report it and see if I can get the moderators to take notice.
I can also confirm that the 2024 programmer put the numbers in SSN format, and I don't recall any complaints about bugs last year, so the SSN format must normally go through ok.
It may help if you will go to the help menu and select "Send file to agent". This uploads an anonymous version of your file to the tech support database and gives you a token (code) number. Post the token number in your followup so that the moderators can find the file you are having trouble with.
Since you need to mail a signed original copy of form 8283 to the IRS even if you e-file, there might be a workaround if this can't be fixed by the programmers.
