@william-francesc
Are you an Advantage member with an annual subscription? Was it registered to you or your late husband? If it was your late husband's account, are you able to log into the Advantage account that was used?
If you can log in, see this FAQ on how to cancel an Advantage subscription:
FAQ: How do I cancel my TurboTax Advantage subscription?
https://ttlc.intuit.com/community/downgrading/help/how-do-i-cancel-my-turbotax-advantage-subscriptio...
