What You Need to Know
These forms are subject to change only by federal or state legislative action.
All printable Massachusetts corporate excise tax forms are in PDF format. To read them, you'll need the free Adobe Acrobat Reader.
If you have any suggestions or comments on how to improve these forms, contact the Forms Manager at dorforms@dor.state.ma.us.
2024 Corporate Excise, 2025 Credit Schedules, and All DOR Tax Forms
Corporate Due Dates & Extensions
These are due dates for calendar year filers. Fiscal year filers must determine due dates based upon tax period end date. Extension and estimated payment due date information is included. Go to Corporate Due Date and Extensions.
DOR Approved Software Developers
Software developers approved by DOR for participation in the Massachusetts Electronic Filing Program.
File and Pay Online with MassTaxConnect
MassTaxConnect is DOR's web-based application for filing and paying taxes. It's fast, safe and secure.
Prior Year Corporate Excise Tax Forms & instructions
Prior Massachusetts corporate forms and instructions are listed for tax years 2023-2011.
Estimated Tax Payment Vouchers
All corporations and financial institutions that reasonably estimate their excise to be in excess of $1,000 for the taxable year are required to make estimated payments.
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