"...I will pay PAs state tax because that's where my income comes from?"
Not because your income comes from PA, but because you have an available workplace in PA and you instead elect (for your own convenience) to work remotely from a location outside PA. The PA laws that apply to your situation have been referenced in previous posts on this thread.
There are a handful of states that have similar "convenience of the employer" laws. PA is not the only such state.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
