Unfortunately, there isn't a way to delete an account but an account can be deactivated. To deactivate an account, you need to contact customer service.
If
you choose this, all access to the specific login will be terminated.
This will terminate access to any service under that login (TurboTax,
Quicken, Mint, etc.).
Please see FAQ below for instructions to contact customer service.
https://ttlc.intuit.com/replies/3300041