I am getting ready to file my 1099’s electronically and Submitted Form 4419 to the Government. I called them and they gave me my TCC number. In the Electronic Filing Transmitter Set Up Screen I see something for a TIN number? What is this and do I need it? I want to make sure I have that screen filled out properly before e-filing. Are there instructions on how to e-file that I can download from the site?