Massachusetts Department of Revenue Form 355SC Domestic or - mass 2026

1. Click ‘Get Form’ to open it in the editor.
2. Begin by entering the corporation's name, U.S. Principal Business Code, and Federal Identification number in the designated fields.
3. Fill in the principal business address, including city, state, and zip code. Ensure accuracy for correspondence purposes.
4. Indicate if this is an amended return or if the corporation is incorporated within Massachusetts by checking the appropriate boxes.
5. Complete the sections regarding dates of incorporation and business commencement in Massachusetts, ensuring all date formats are correct.
6. Proceed to fill out the computation of excise section, carefully following instructions for each line item related to income and applicable credits.
7. Review all entries for accuracy before signing. Use our platform’s tools to add your signature and date where required.

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