Presumably you're on Win 10 or Mac OS 13 which Turbotax no longer supports. Online navigation is different to desktop, it's very interview-centric and constantly upselling, functionality is different (no forms mode) and you can only file 1 return per account, it's generally more expensive than desktop. I don't think the switch is a good experience for long-term desktop users.
To request a refund try this or you may need to call Turbotax but say "billing" when asked the reason for the call.
https://ttlc.intuit.com/turbotax-support/en-us/help-article/intuit-refunds/request-refund-turbotax-p...
