I had a HDHP from January 1st to July 31st, 2021 and a non-HDHP from July 8th to December 31st, 2021. Was I eligible to contribute to my HSA for 6 or 7 months? Based on the turbotax guidance and prompts it is 6, because I had both non-HDHP and HDHP in the same month. The IRS instructions for form 8889 say 7 based on the fact that I was covered only by the HDHP on the first day of July. So I am eligible for the entire month of July. I'm not sure which one is correct.
