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 PDF