Follow the steps to complete the NY DTF CT-5.1 form online.

1. Press the ‘Get Form’ button to access the form and open it in your preferred editor.
2. Enter the tax period details. This includes the employer identification number (EIN) and file number, followed by the beginning and ending dates of the tax period.
3. Fill in the business telephone number, legal name of the corporation, trade name or DBA, and the mailing address information, including street address, city, state or country of incorporation, and ZIP code.
4. For foreign corporations, input the date business began in New York State and the date of incorporation, along with the country of incorporation if it is not the United States.
5. Indicate the specific types of tax returns for which you are requesting an extension by marking an X in the respective boxes. Ensure you complete this step accurately for all applicable tax return types.
6. If you are part of a combined group, provide the EIN of the designated agent for combined group filers and check the appropriate box (line B or C) based on your situation.
7. Provide an explanation for the additional time requested to file, ensuring the explanation is clear and concise.
8. Complete the certification section by providing the printed name, signature, official title, email address, and telephone number of the authorized person certifying the document.
9. If a preparer is involved, ensure they fill out their section completely, including firm name, signature, and any required identification numbers.
10. Review all the information provided to ensure accuracy. Once confirmed, save changes, and proceed to download, print, or share the completed form.

Complete your NY DTF CT-5.1 form online today for a smooth filing experience.