Form 40 Oregon - Form 40 can be efiled, or a paper copy can be filed via mail. Web view all of the current year's forms and publications by popularity or program area. We may adjust your return without it. Select a heading to view its forms, then u. Web form 40 is the general income tax return for oregon residents. You’ll owe interest on any unpaid tax starting april 19, 2023,.
We may adjust your return without it. Select a heading to view its forms, then u. Web view all of the current year's forms and publications by popularity or program area. Web form 40 is the general income tax return for oregon residents. You’ll owe interest on any unpaid tax starting april 19, 2023,. Form 40 can be efiled, or a paper copy can be filed via mail.