I have not filed yet, but returns are done. How do I go back and change charitable deductions on OR state return? I have in $81. in deductions and my return is negated.

Yes, if you have not e-filed or mailed your return, you may return to any topic to review your entries or make changes.

For any state topics, open your return and click on the State tax. Choose the state you need to work on and follow the prompts.