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.

• Read More
• Additional IRS Publications
  
  

Software Developer's Guide
Download TY2010 Guide (Draft v2.0 10/29/10)

Electronic Return Originator's Guide
Download TY2010 Guide (Draft v1.0 11/19/10)

NYC-Specific Schemas
Download TY2010 Schemas (Draft v4.0 12/14/10)
Embedded TY2010 Generic Schedules (10/29/10)
Attached TY2010 XML Schedules (12/02/10)

Business Rules
Download TY2010 Business Rules (v6.0 02/23/11)
2010 PDF Naming Conventions (02/18/11)

Error Codes
Error Categories and Messages

Test Packages
2010 GCT Test Package (v1.0 12/02/10)
2010 GCT Test Package (v2.0 12/15/10) 
2010 UBT Test Package (v1.0 12/02/10)
2010 UBT Test Package (v2.0 12/15/10)