Software Developers Efile

Software developers are required to successfully complete the Connecticut Participant Acceptance Testing System (PATS) test for Legacy e-file and and ATS testing for Modernized e-File (MeF). The purpose of PATS/ATS is to ensure that the software meets Connecticut specifications, the electronic returns have no validation or computation errors, and the returns can be transmitted in the correct format.

Software developers should visit the Software Developers Log-in

If you are not registered with the DRS please click on this link

Register Now

  • For additional information regarding e-file, contact the DRS Electronic Filing help desk at 860-297-4713.