Current Revision Form 4419 and Instructions PDF Recent Developments Effective September 26, 2021, Form 4419 is being replaced by the online Information Returns Application for Transmitter Control Code (IR Application for TCC) located at Access IR Application for TCC. The IR Application for TCC will allow you to request an original TCC or additional TCC. Submit a paper Form 4419 (Rev. 9-2021) when you have an existing Transmitter Control Code (TCC) that was issued prior to September 26, 2021 to: Revise current TCC information legal business name, mailing address, and/or contact information Due Date: Submit your IR Application for TCC by November 1 of the year before information return(s) are due to ensure you are ready to electronically file. Form 4419 received after November 1 may not be processed in time to meet your electronic filing needs. Allow 45 days for processing. Visit TCC Security Updates for more information about the IR Application for TCC. Other Items You May Find Useful Publication 1220, Specifications for Electronic Filing of Forms 1097, 1098, 1099, 3921, 3922, 5498, and W-2GPDF
