2018 Information for Software Developers

All participants in the NYC program must comply with the procedures, requirements, and specifications as detailed in IRS Publication 3112: IRS e-File Application and Participation and IRS Publication 4164: Modernized e-File Guide for Software Developers and Transmitters.

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Additional IRS Publications

Software Developer’s Guide
Download TY2018 Guide

NYC-Specific Schemas
Download TY2018v3.1 MeF Schema

Business Rules
Download TY2018 Naming Conventions
Download TY2018 Business Rules

Error Codes
Error Categories and Messages

Test Packages
2018 COR Test Package v1.0
2018 1127 Test Package v1.0
2018 GCT Test Package v1.0

2018 UBTI Test Package v1.0
2018 UBTI-EIN Test Package v1.0
2018 UBTP Test Package v1.0

Other Links
Business Tax Services
Email Business Tax e-File (BTeF)