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Business Tax Services

Information for Software Developers

The New York City Department of Finance would like to partner with the software industry to encourage electronic filing of New York City General Corporate Tax (GCT) returns. This program allows New York City corporations to electronically file both their federal and NYC corporate returns together.   We realize the success of this program depends upon the efforts of both the participating software developers and the Department of Finance.

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, IRS Publication 4164:  Modernized e-File Guide for Software Developers and Transmitters asd set forth in this handbook.
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arrowAdditional IRS Publications

Software Developer's Guide
arrowDownload 2009 Guide (Draft 10/06/09)
arrowDownload 2008 Guide (Updated 05/18/09)

NYC-Specific Schemas, Rules and Error Codes
arrowDownload 2009 Schemas (Draft 08/31/09)
arrowDownload 2008 Schemas
arrowDownload 2008 Business Rules
arrowDownload 2008 Error Codes

Test Packages
arrow2008 Test Package (Small to Medium Corporations)
arrow2008 Test Package (Large Corporations)

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