I assume you used the desktop product last year and have a *.tax2023 data file on your computer. You can transfer it into your 2024 online return once you begin answering the initial questions to choose an online product. Here's how:
https://ttlc.intuit.com/turbotax-support/en-us/help-article/import-export-data-files/transfer-last-y...
See VolvoGirl's posting that follows below for additional info.
