First Line''s 4506-Express is an income verification service that helps your streamline the 4506-T verification process. By managing and tracking the process for you we make verifying borrowers'' income with the IRS fast and efficient. Results are delivered electronically and tracking the status of all requests is provided through our interface. In addition, we offer IRS tax transcripts associated with IRS tax forms: W2, 1099, 1065, 1120, and 1120S.