I worked as interpreter 100% from my MD home. W-2 by CA co and 1099-Misc by TX/PA cos. I filed Fed n MD returns. No need to file returns in CA, TX, PA. Am I right ?

[waqui]

I only worked from MD home via tel / video.  W-2 from CA-based co, and 1099s ( no w/holdn) from TX-/PA- based cos.

[MichaelL1]

You are correct, if you did not live or work in those states, no return is necessary to be filed there.