Instructions for Form OR-TM, 150-555-001 "Tri-County ... 2026

1. Click ‘Get Form’ to open it in the editor.
2. Begin by filling in your name, SSN, and business address in the Name and Address section. Ensure that you do not include a FEIN if filing as an individual.
3. For self-employment earnings, enter the amount from your federal Schedule SE on line 1. If you have multiple businesses, only include earnings from those within the TriMet District.
4. Complete line 4 for exclusions. Enter $400 or the amount on line 3, whichever is less. If applicable, indicate any unused exclusion from previous filings.
5. If your business operates both inside and outside the district, complete Schedule OR-TSE-AP and attach it to your form.
6. Review all entries for accuracy before signing and dating your return. Submit your completed form via e-filing or mail it to the Oregon Department of Revenue.

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