80534jm
Returning Member

HSA - HR mistake, not putting money in

I contribute every year into HSA (family maximum). Last year 2021 my works HR put their contribution in ($800) but did not pull out my portion out of my paychecks. Not sure why. I tried to contact them to find out more but haven’t heard back yet.

I know there is a form I can fill out and send money into my HSA account now for last year but would that be smart?

The money I would send in is not pre taxed anymore.

Will it lower my taxable income? 
I never spend any money from the HSA and use it only to invest the money sitting in there.

Any input will be highly appreciated since searching for this issue is not successful since this situation don’t happen a lot. 
Thank you 🙂