If my 529 contributions are more than the limit ($4,000 for each beneficiary if Married Filing Jointly)? Which number should I add in Turbo Tax? the real contribution number or just the limit?
You should only enter the deductible amount, up to the limit per beneficiary.
Since there is no place to input the number of beneficiaries for which you contributed, TurboTax has no way to calculate the limit for you.