NYC-3A/B - Attachment to NYC-3A (Subsidiary Detail Spreadsheet) NYC-3A - Combined General Corporation Tax Returnĭownload General Corporation Tax Worksheet - You must attach this worksheet to amended returns reporting changes or corrections to taxable income or other bases of tax by the IRS or New York State DTF.NYC-NOLD-GCT - Net Operating Loss Deduction Computation.NYC-EXT.1 - Application for Additional Extension.NYC-EXT - Application for Automatic Extension of Time to File Business Income Tax Returns.NYC-ATT-S-CORP - Calculation of Federal Taxable Income For S Corporations.Current General Corporation Tax (GCT) Forms 2022 General Corporation Tax (GCT)ĭocuments on this page are provided in pdf format.