MJB,
I am not a tax expert (nor do I play one on TV) but I think I have gained some understanding of this #$*^@ program after toiling on it for countless hours.
1. I think you do need to file form 2210 since you made variable estimated payments (per the instructions on form 2210)
2. If Box D is marked, you must have said "yes" when TT asked you if wanted to figure your tax withheld on the actual days it was withheld (I assume you must have had some income that had automatic withholdiing on it. That question comes up after you input all the information for your quarterly income and payments you need for filling out 2210 AI. You should answer "yes" to annualized income and "no" to the method of using days actual withheld. Of course, if that results in a penalty then you don't want to do that. If you paid too much upfront, I would think you will be okay using annualized income (Method C) as I did.
3. The printout for my filing included all pages of Form 2210 as well as schedule AI.
