State tax filing

When asked to enter the accounts and amounts, I'm having a problem.  I have two children, and each child has 3 different account numbers (since in the self-directed investment option for va529, each mutual fund investment has a different account number).  So this is leading to a falsely large allowable deduction for 2022.  I put in 16k this year (8k for each child), as well as an 8k unreported carryover from an earlier year.  Turbotax is telling me that i can deduct $15k this year, and $9k will be carried over to next year.  That seems impossible, since I believe the deduction limit is $4k per child, so my maximum deductino for 2022 should be $8k, right?  How can I do the bookkeeping properly for these 3 different account numbers per child?