Deductions & credits

medical expenses paid through an HSA are not deductible as medical expenses. if you deducted medical expenses in 2020 that you used your HSA to reimburse in 2021, 

You can’t deduct these medical expenses as
an itemized deduction on Schedule A (Form
1040) that are equal to the tax-free distribution
from your HSA

you would need to amend 2020