That's one job I don't think I'd like to have. I'm a part time Accounting and Business Math instructor trying to figure this stuff to be able to do what's best for me and to be able to explain things to my students. So, on the one hand, I know way more than I want to, but on the other hand, still have questions I need answered for me an my situation.
So, in my previous reply I was agreeing with you and reiterating what you said in the terms I've been reading. Any trepidation in my answer was a combination of my lack of knowledge and the fact at times they seem to be making it up as they go along.
One question I have been having trouble answering is when I'm required to update income information with the government during the year. Being part time faculty, my pay is based on how many of my classes end up going. So my pay is extremely variable from month to month.
January I normally have almost no income I get paid for spring classes over Feb, March, April, and half of May. I miss another pay and get summer pay over June July and August. Finally fall pay is the half of Sept, Oct, Nov, Dec. Normally, Fall is my best semester for getting classes so most of my income normally comes in the fall and I don't have a good handle on annual income until late August early September. To make matters worse, I'm right on the boarderline of 200% FPL. One class one way or another can potentially on one side or the other of that line.