Washington Partnership Tax Deadlines 2026
Complete guide to Partnership filing dates, extensions, estimated payment schedules, and required forms in Washington for the 2026 tax year. Washington does not have a state income tax, so Partnership entities only need to file federal returns.
Washington Partnership filing deadline
No state individual income tax. Other business taxes may apply.
Due: N/A
Form: N/A
Estimated payments
No state estimated payment schedule listed.
Due: N/A
Washington Partnership Tax Calendar at a Glance
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FAQ
When is the Partnership tax filing deadline in Washington for 2026?
Washington does not have a separate state filing requirement for Partnership entities. Check with Washington Department of Revenue for the latest information.
Does Washington require Partnership estimated tax payments?
Estimated payments are not typically required at the entity level for Partnership in Washington, but confirm with Washington Department of Revenue.
What form do I file for a Partnership in Washington?
Partnership entities in Washington file using Form N/A. You can download the form from Washington Department of Revenue at https://dor.wa.gov.
Can I get an extension for my Washington Partnership tax return?
Check with Washington Department of Revenue for extension options for Partnership entities in Washington.
What are the penalties for filing late in Washington?
Washington typically charges a failure-to-file penalty (usually 5% of unpaid tax per month, up to 25%) and a failure-to-pay penalty (usually 0.5-1% per month). Interest also accrues on unpaid balances. Filing for an extension by the original deadline avoids the failure-to-file penalty but not the failure-to-pay penalty.
Where can I file Washington Partnership taxes?
File through Washington Department of Revenue. Visit https://dor.wa.gov for e-filing options, downloadable forms, and payment portals.