Well, when I manually set all fields of the form to empty values, it's not enough, TT keeps asking me to fill in W4. What I did instead I opened the form in TT form editor and clicked on the checkbox saying to leave all values blank. That seems to get the issue resolved, but it's so weird I have to do it manually in form editor, and had to search for the solution for hours. There is no way to revert it once you open W4 withholdings wizard, which seems to me a bug or unfinished feature.
