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 2024 known issues and solutions taxpayer portal XLSX (updated Jan. 28, 2025)
- Tax year 2023 known issues and solutions taxpayer portal XLSX (updated April 24, 2024)
IRIS A2A
- Tax year 2024 known issues and solutions IRIS A2A XLSX (updated Nov. 20, 2024)
- Tax year 2023 known issues and solutions IRIS A2A XLSX (updated April 24, 2024)
IRIS A2A ATS
- Tax year 2024 known issues and solutions IRIS A2A ATS XLSX (updated Dec. 17, 2024)
- Tax year 2023 known issues and solutions IRIS A2A ATS XLSX (updated Sept. 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.