New York – Form IT-399 – New York State Depreciation Schedule

Table Of Contents

Article: 50508

Overview 

New York State requires certain adjustments to be made for property placed in service in tax years when federal depreciation rules differ from New York’s. Most commonly, this applies to bonus depreciation (e.g., Section 168(k)) and certain property depreciated under MACRS. 

To report these adjustments, you must complete Form IT-399 – New York State Depreciation Schedule and attach it to your Form IT-201, IT-203, or IT-204. 

Who Should File Form IT-399? 

You must file Form IT-399 if: 

  • You are claiming depreciation or disposition adjustments due to differences between federal and New York depreciation rules. 
  • You placed property in service in tax years where New York decoupled from federal bonus depreciation rules (e.g., 30%, 50%, 100% bonus depreciation under Section 168(k)). 
  • You are required to adjust your depreciation schedule for New York purposes. 
  • You are reporting a gain or loss on a sale of depreciated property where the depreciation differed between your federal and NYS returns.  

How to Report 

  1. Navigate to the State Taxes section on the left-hand side of the screen. 
  1. Click the link: I’d like to see the forms I’ve filled out or search for a form. 
  1. In the dropdown menu, select New York. 
  1. Click on the General tab. 
  1. Select IT- 399 – Depreciation Schedule to open the screen. 
  1. Enter all applicable information.  
  1. Click Save once complete. 

Additional Resources 

For further guidance, see:  

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