What subscription? Turbo Tax is not a subscription. You are posting from the online Free Edition. Or are you asking about the Turbo Tax Advantage Auto-Renew Plan where they send you the Desktop CD each November?
If you are using the Online version and have not filed yet you can just leave and abandon it. You can try to clear an Online return
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-clear-and-start-over-in-turbotax-onli...
Or have you already submitted it?
