I'm also having this issue. It will not let me e-file without the tax ID. I have 2 contractors to pay but only have the SSN of one of them. He will not give me his SSN but I still need to file. It is also not letting me proceed to send a 1099 to the one I do have the information on without filling out the other's information.

I read on a help thread to put in [removed] but this is not working.