In the Search box in TurboTax, type "hsa" (without the quotes), then click the link that says "Jump to hsa" and go through the questions. You will come to a screen that asks about contributions that you made personally to your HSA. Entering the amount there is how you get the HSA deduction. TurboTax will fill out Form 8889 and you will see the deduction on Schedule 1 line 13.
You cannot claim an HSA deduction for medical bills that you paid before you opened the HSA account. If you have enough deductions to claim itemized deductions, you can include those earlier payments in your medical expenses. But you only get a deduction for medical expenses in excess of 7.5% of your Adjusted Gross Income (AGI). (Enter the full amount that you paid in TurboTax. TurboTax will subtract 7.5% of your AGI.) In addition, since medical expenses are an itemized deduction, they will not reduce your tax or increase your refund unless your total itemized deductions are more than your standard deduction.
