Thought I'd post an update to this in case anyone is interested.

I spent many weeks following up on this. Lots of emails, lots of phone calls, lots of promises. A couple of weeks ago someone from Intuit called me and said she was a manager. She said my bonus had been coded incorrectly and that's why I (and my friend) did not get it. And, they are only disbursed once per year (!) so we would not get it until 2022.  To which I said, you have got to be kidding.

She agreed it was unreasonable and arranged for me to get $350 (the total bonus) right away, which did happen, and my friend and I are still on the list to get the referral bonus in 2022. I asked if she could send that in email, which she did, so in 2022 I'll be following up again.

All the Intuit people were invariably polite and seemed to want to help which I appreciate.  Although the final result is certainly fair it took way too much time and effort. I mainly felt bad for my friend, who bought ProSeries at my recommendation.