Couldn't you install the Deluxe download program? Sorry you can't apply the Desktop CD/Download program and License Code to the Online version. They are separate prices and work different. So you need to get a refund for the Desktop program and pay for the Online version. Or switch to your Desktop program.
You need to install the program on your computer and move your online return to the Desktop program. How to install the CD/Download program with a License Code
https://ttlc.intuit.com/community/tax-topics/help/activating-turbotax-cd-download-software/00/852971
Then you can download the .tax2022 data file without paying for Online and continue in the desktop version.
First save your return as a tax data file from Online
https://ttlc.intuit.com/community/saving/help/how-do-i-save-my-turbotax-online-return-as-a-tax-data-file/00/25740
See how to switch to the Desktop program,
https://ttlc.intuit.com/community/choosing-a-product/help/how-do-i-switch-from-turbotax-online-to-the-turbotax-software/00/26129
After you get the program installed the first thing to do before you open your tax return is to update the program and install any state programs you had. Then open your file. So you first might need to start a fake return to be able to download the state program (go to FILE - NEW). Enter some basic information, then go to the state tab and download the state program. Then try to open your existing return, go to FILE - OPEN