Again--what you pay in 2019 goes on your 2019 return.
MEDICAL EXPENSES
The medical expense deduction has to meet a rather large threshold before it can affect your return. The amount of medical (including dental, vision, etc.) expenses that will count toward itemization is the amount that is OVER 10% of your adjusted gross income. You should only enter the amount that you paid in 2019—do not include any amounts that were covered by insurance or that are still outstanding. Of course, your medical expenses plus your other itemized deductions still have to exceed your standard deduction before you will see a difference in your tax due or refund.
To enter your medical expenses go to Federal>Deductions and Credits>Medical>Medical Expenses
2019 Standard Deductions:
Single $12,200 (+ $1650 65 or older)
Married Filing Separately $12,200 (+ $1300 65 or older)
Married Filing Jointly $24,400 (+ $1300 each spouse 65 or older)
Head of Household $18,350 (+ $1650 65 or older)
https://turbotax.intuit.com/tax-tips/health-care/medical-expenses-checklist/L6MkxxlyW
https://ttlc.intuit.com/questions/2895072-can-i-deduct-medical-costs-paid-through-my-hsa-or-msa
https://ttlc.intuit.com/questions/2895188-where-do-i-enter-my-medical-expenses
https://ttlc.intuit.com/questions/2895189-what-kinds-of-medical-expenses-are-deductible
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
