First, gifts are reported on a separate form called Form 709. It's not part of your tax return and Turbotax does nt prepare this form, although it has the same deadline (April 15).
Second, gifts over $15,000 per per per year must be reported, but are not actually taxed unless the total of your lifetime gifts and estate is more than $11 million. Gifts are never "not allowed", it's just that you have to make a report for larger gifts.
Third, in this case I would say that in the end, the "gift" is $15,000 and no form 709 is needed (although you are worrying for nothing). A true gift can't have strings attached. If you could take back 2/3 of the money, then it did have strings attached and the net gift amount is just the $15,000 remaining.
Fourth, if your daughter is a minor, you need to read up on the Uniform Gift to Minors Act, and special rules for taxation of a child's investment income.
https://www.irs.gov/taxtopics/tc553
https://www.nerdwallet.com/article/investing/utma-ugma
If you made this gift for some other reason than just giving money to help a family member (like estate planning, or reducing the tax on your own investments) you may want the advice of a professional financial planner.
