Near the end of January you'll receive from the HSA custodian a code 2 Form 1099-SA that you'll need to enter into TurboTax in the HSA section. (Indicate that you used your HSA to pay for something during the year; this is TurboTax's way of asking if you obtained any distributions from the HSA.) TurboTax will include the taxable amount on Schedule 1 line 8, identifying it as coming from your HSA.
