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POAs and Third party authorizations
2017 Personal Income Tax Changes
E-Filing Options Using Commercial Software
E-Filing and Payment Requirements
When to file an amended return
Who’s a Massachusetts resident, non-resident or part-year resident?
Additional Information
Administrative Procedures – Learn how things work at DOR
DOR Legal Library – Regulations, TIRs, Directives and more
Information for New Businesses
Tax Bills, Collections, Audits, Appeals