Sounds similar to what I just went through. I ended up revisiting my state return in TurboTax and unchecked the box for the Metro Homeless Tax which I'm sure is one of the taxes affecting you as well. I was able to file my return successfully after I removed that local tax.
The downside is that does mean I will have to file my local taxes separately through the Portland Revenue Website but I felt that was better tradeoff than being held hostage to whenever Portland gets their act together to work with TurboTax.
