Sole Proprietorship Tax Deadlines in Arizona
Federal and state filing dates, extensions, and estimate schedules for 2026.
Arizona filing deadline
Business income reported on AZ personal return.
Due: Apr 15, 2026
Extension: Oct 15, 2026
Form: Form 140 / 140NR
Estimated payments
Estimated payment dates: Apr 15, 2026, Jun 15, 2026, Sep 15, 2026, Jan 15, 2027.
Due: Apr 15, 2026
FAQ
Does Arizona require Sole Proprietorship estimated payments?
Estimated payments are scheduled for Apr 15, 2026, Jun 15, 2026, Sep 15, 2026, Jan 15, 2027.
Where can I file Arizona Sole Proprietorship taxes?
Use Arizona Department of Revenue resources at https://azdor.gov for forms and filing instructions.