TurboTax 2024 still blocked me from sending both returns at the end of February, and I tried both deleting the -02 (the new system has a letter at the beginning and, if you have more than one 529 people, keeps the same number and adds a -01 and a -02), didn't work, and the A at the beginning (didn't work), and the all 4 and it finally worked. However, I hope they fix it for the rest of you, because I am expecting an audit.
