First time? Start here.
Guide:
Official websites use .mass.gov
A .mass.gov website belongs to an official government organization in Massachusetts.
Secure websites use HTTPS certificate
A lock icon ( ) or https:// means you’ve safely connected to the official website. Share sensitive information only on official, secure websites.
Log in links for this page
Massachusetts imposes a corporate excise tax on certain businesses.
9 a.m.–4 p.m., Monday through Friday
If you would like to continue helping us improve Mass.gov, join our user panel to test new features for the site.
Join user panel