I'm having the same problem: a 1099-NEC that has no state tax ID number but TurboTax wants something in the box 6 field. I contacted the employer, a non-profit, who says there is no state ID number. Employer provided some kind of ID number, which I entered. TurboTax seemed happy as long as field wasn't blank. No state tax was withheld, so blank there ($0) is accurate. Other discussions said to just put the Federal ID number there.
Any assistance appreciated.
