Known issues and solutions are listed by tax year for the IRIS Taxpayer Portal, IRIS application to application (A2A) and IRIS A2A Assurance Testing System (ATS). IRIS taxpayer portal Tax year 2023 known issues and solutions taxpayer portal XLSX (updated April 24, 2024) IRIS A2A Tax year 2023 known issues and solutions IRIS A2A XLSX (updated April 24, 2024) IRIS A2A ATS Tax year 2023 known issues and solutions IRIS A2A ATS XLSX (updated September 23, 2024) IRIS help Get support with IRIS: Help desk Call Mon. – Fri. 7:30 a.m. – 7 p.m. Eastern time. Toll-free: 866-937-4130 International: 470-769-5100 TTY/TDD: 866-937-4130. Use your choice of relay. Working group meetings Find meetings and notes for A2A developers, transmitters and state agencies. Related Guide to information returns General instructions for certain information returns
