CAUTION: This tax return must be filed electronically. - Mass.gov 2026

1. Click ‘Get Form’ to open it in the editor.
2. Begin by entering the tax year dates in the designated fields for both calendar and fiscal year filers.
3. Fill in the corporation's name, federal identification number, and principal business address accurately.
4. Indicate if this is an amended return or if there are any changes such as a name change or final return by checking the appropriate boxes.
5. Complete the excise calculation section by entering values from relevant schedules, ensuring all calculations are accurate.
6. Sign and date the form at the bottom, ensuring that all required signatures are included before submission.

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