It depends.
If you want to deduct expenses incurred in subletting the unit, you would use the Rental Properties and Royalties interview of TurboTax Self-Employed (or Home & Business). Report income and expenses in this interview (you can't claim depreciation expense if you are sub-letting).
If you just want to report income, you can do that in the "Other Reportable Income" interview.
This is the very last interview in Wages and Income (Federal Taxes > Wages & Income > Less Common Income > Miscellaneous Income ). For the Description, enter "AirBnB".
(Or enter "other reportable income" in the Search Box and select "jump to other reportable income". These payments are NOT wages).
This income will appear on Line 8, Form 1040.
