How does working in another state work? I work in PA and live in OH and I know they have reciprocal agreements but my ohio city isnt taking any tax off my paystub?

How will this affect my return? Who do I file with? PA or OH? The only income comes from PA. I've been taxed for a different city in OH earlier in the year so do I file PA and OH? I'm still being taxed for the state of OH and have been taxed for the state of PA but my city that i live in ohio isn't taxing me anything.