a workaround that folks have reported for this type of problem, instead of starting a new return and then going thru the import steps - instead do File > Open Tax Return and open the .tax2024 file, it will detect it's from 2024 and ask if you want to carry it over into a new 2025 return.
see
https://ttlc.intuit.com/community/taxes/discussion/re-2025-turbo-tax-will-not-import-my-information-...
