I don’t think I’ll get one. We sold my granny’s house last year and the capital gains raised our tax bracket too much.
In my search they did document a wage ceiling. When I get on my desktop I could send a link but a search should bring up a number of sites; AARP and AMAC were at the top of the pile. If you file a joint return there are different figures -- I just didn't pay any attention. I am a pauper. :^)