The purpose of the question is to determine whether you have to file a tax return in any other state. The key factor is where you were when did the work that you got paid for. If you performed services in another state, you have to file a nonresident tax return in that state and pay tax on the income that you earned there. It doesn't matter where you do your billing or where your office or your bank are. What matters is where you did the work.
If you consult via Zoom, or work on a computer remotely, as long as you are sitting in your home state when you do it, you are not working in the other state or earning money in the other state.
