You need the 2023 tax file ending in .tax2023 to transfer into 2024. There is no “export”. You start a new 2024 return and the first thing it should do is look for all files ending in .tax2023 on your computer to transfer. Are you on Windows or Mac?
How to transfer into Windows Desktop
https://ttlc.intuit.com/community/entering-importing/help/transfer-last-year-s-return-to-turbotax-fo...
How to transfer into Mac Desktop
https://ttlc.intuit.com/community/tax-data-file/help/how-do-i-transfer-last-year-s-return-into-the-t...
