Box 16 on 1099-R is blank

My wife and I got Fidelity 1099-Rs for our IRA distributions. Both of them have a blank in Box 16 State Distribution. But the distributions are taxable in NC.

I saw some AI answers that said to ignore the blank and to enter the Taxable Distribution Amount from Box 2a as the entry for Box 16. If it makes a difference, we did have NC taxes withheld.

So what do I enter in TurboTax for Box 16 State Distribution?