Is there an amount of state tax withheld in box 5? If state tax was withheld, you have to identify what state it's for. If the 1099-NEC has state tax withheld, and no 2-letter state abbreviation in box 6, the 1099-NEC is not filled out correctly. You can get around the error in TurboTax by entering the 2-letter abbreviation for the state. But if the state is not shown on the 1099-NEC form, it raises the question of whether the payer paid the tax to the state. You should contact whoever issued the 1099-NEC and ask for a corrected form.
The payer's state tax ID number should also be in box 6, but TurboTax will not object if the state number is omitted.
