On that TurboTax screen where it's calculating your State tax deductions based on your 529 plan contributions, there are three columns (something to this effect): Beneficiary Name, Contribution Amount, Unused Amount. The Contribution Amount you should be able to see online with your 529 provider website or in the statements you receive by email/mail. That's the total amount you contributed to each beneficiary's account last year. I live in Ohio, and use their 529 Plan. Their plan limit is $4,000 for tax deduction purposes (you can put more in, but only $4,000 is tax deductable). So for example, if you contributed $5,000 to Child A, you put that amount in the Contribution Amount column on the TurboTax screen, and the $1,000 in the Unused Amount field (because $5,000-$4,000=$1,000). Since there is no in-line screen help for 529 Plans in TurboTax, I had to use the Chat agent for help and read thru the Ohio 529 Plan help screens to figure this out.
