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- Click ‘Get Form’ to open the CT-399 in the editor.
- Begin with Part 1, where you will compute New York State depreciation modifications. Fill in your corporation's legal name and employer identification number at the top.
- In Section A, list each item of depreciable property. For each item, provide a description and complete columns B through I, including details like date placed in service and cost basis.
- Proceed to Section B for property qualified under IRC section 168(k)(2). Again, describe each item and fill out the necessary columns as instructed.
- If applicable, move to Part 2 for disposition adjustments. Here, calculate differences between federal and New York State depreciation deductions for disposed properties.
- Finally, summarize your adjustments in Part 3 by entering amounts from previous sections into the designated lines.
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