You cannot enter the Section 1127 withholding in the federal section of TurboTax where you enter your W-2. You have to enter it in the NYC-1127 topic in the New York tax return. In the New York return go to "Credits and other taxes" then "NYC Nonresident Employees Employment Tax (NYC-1127)." One of the first screens says "Tell Us About Your NYC Employment." On that screen there is a box for "Withholdings from 2020 Form NYC-1127.2." You enter the amount that was withheld in that box.
