@sunchi You will need to just seek a refund for the desktop download that you are not able to use on your Mac. You cannot use the license key for online TurboTax. You can use online but you will need to pay the normal online fees for doing so.
To request a refund for a TT product
https://ttlc.intuit.com/turbotax-support/en-us/help-article/intuit-refunds/request-refund-turbotax-p...
ONLINE 2024
https://turbotax.intuit.com/personal-taxes/online/
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
