Follow the steps to successfully complete the NY DTF CT-13 online.

1. Press the ‘Get Form’ button to access the CT-13 form and open it in the online editor.
2. Enter the tax period for which you are filing. All filers should clearly indicate this information at the top of the form.
3. Input your employer identification number (EIN) and file number, if applicable. Ensure that these numbers are accurate to avoid any filing issues.
4. Provide the legal name of the corporation and, if applicable, the trade name or 'doing business as' (DBA) name.
5. Complete the mailing address fields, including care of (c/o), number and street or PO Box, city, state, and ZIP code. This information is crucial for correspondence.
6. Indicate your state or country of incorporation. If you are a foreign corporation, please include the date business commenced in New York State.
7. Fill out the section regarding your principal unrelated business activity and provide the NAICS business code number from your federal return.
8. For any applicable boxes regarding overpayments or statuses such as ceasing business operations, mark 'X' where required.
9. Calculate your income and taxes based on the computation section. Follow the line-by-line instructions for lines 1 through 25 to ensure accurate reporting.
10. If applicable, complete the schedule for unrelated business allocation. This will require inputting average values and obtaining percentages for your operations in New York State.
11. Review all entries to confirm accuracy. Make any necessary revisions before proceeding.
12. Once completed, you will have the option to save your changes, download a copy for your records, print the document, or share it as needed.

Complete your NY DTF CT-13 form online today for a smooth filing experience.