I keep getting emails and letters to update my credit card. I did that a month ago. If this continues, I may have to cancel and get TurboTax from someone else.

[Gburt82]

I have changed my credit card 3 times because the card ending in 9470 was discontinued due to fraud activity. i have entered a new card number ending in 6796 but the old 9470 number keeps coming up in your records. Why ?

[VolvoGirl]

Are you on the Advantage plan?  You might have more than 1 account.  It's common to end up with multiple accounts. First LOG OUT of whatever TurboTax account you're logged into right now. Then use this TurboTax account recovery website to get a list of user ID's for an email address. Run the tool against any email addresses you may have used
https://myturbotax.intuit.com/account-recovery/

You might need to cancel any other accounts.  

You can sign into your Turbo Tax Advantage account and under Your Product, select to Remove Product.  Once you remove the recurring product order, the Turbo Tax Advantage subscription will be cancelled as well.

How to cancel Turbo Tax Advantage

https://ttlc.intuit.com/community/downgrading/help/how-do-i-cancel-my-turbotax-advantage-subscriptio...