Can I delete the closed bank account information for my direct deposit and add my new one?

Have you already efiled (submitted) the return?   Or are you just now getting ready to file?

If you haven't yet filed and are seeing wrong bank account information that transferred in from last year, see this FAQ on how to change it.    The method to change it will be in Step 2 of the Refund/Payment info process.

FAQ:  How do I change my transferred direct deposit information?

https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-refund/change-transferred-direct-deposit-information/L77NCbU6D_US_en_US

NOTE:  Be aware that if you choose the optional "Get your refund up to 5 days early", it could end up charging you a $35 service fee.    And also be aware that if you choose to pay your TurboTax fees out of your Federal refund, that payment method has an additional $40 service fee ($45 for California filers.)   So you save money if you pay the product fees upfront with credit/debit card.