there is no such thing as a joint HSA
so for 9 months you could contribute $600/month ($7200/12) to either your HSA or your spouse's HSA or split any way you wanted. in addition, being over 55 you could make a pro rata catch up of $750, ($1000 X 9/12)
your spouse is not 55 no catch up is allowed
for the 3 months she had self-only HDHP coverage she could make a $300/month contribution to her HSA
you over contributed to your HSA. if you don't draw it out by 4/15/2022 it's subject to a 6% penalty. in addition, you can't draw it out in future years to pay other than qualified medical expenses. a non-qualified distribution is subject to regular income taxes and a 20% penalty. leaving the excess in subjects it to another 6% penalty in 2023, and every year thereafter until used
