Official sources
IRIS links and filing resources.
Use current IRS instructions as the final authority for portal procedures, supported forms and CSV requirements.
E-file information returns with IRISPortal overview, forms, CSV templates and current notices
Open IRS.govIRIS application for TCCApply for issuer, transmitter or software developer access
Open IRS.govPublication 5717IRIS Taxpayer Portal user guide
Open PDFPublication 5903IRIS TCC application tutorial
Open PDFCorrections and rejected filings
Need to fix a return after submission?
Use the IRIS Correction Center for accepted-return corrections, rejected-transmission recovery, and form-specific correction guides.
TIN / name cleanup
TIN / CP2100 Resource Center
Catch obvious TIN-format problems before filing, understand CP2100 and CP2100A notices, and review First/Second B Notice and backup-withholding workflows.
2026 filing season
Filing Season CenterPlan recipient copies, IRS filing and extensions together.
Use the Filing Season Center for current planning dates, readiness checks, Form 8809/15397 guidance, and form-specific checklists.