Tag: efin_validation

IRS Releases Updated Publication 1345 for Authorized e-file Providers

2 Nov 2026 11:34 a.m. · Source: IRS

IRS publishes revised Publication 1345 for authorized e-file providers, adding secure APIs for real-time EFIN validation and VCN registration, updated NIST guidance and Executive Order 14247 references.

Politics and Government Business Science & Technology Federal Government Computers and Internet Legal IRS Publication 1345 e-file EFIN validation VCN registration Executive Order 14247 tax software developers