I have a new bank account that i would like for my child tax credit to be deposit, how can i change my bank account that i have on filed?

You cannot change it yet.   Sometime in August the portal for banking information for the monthly CTC payments is supposed to be ready for people who need to change banking information.

See Manage Payments on this link from the IRS:

https://www.irs.gov/credits-deductions/advance-child-tax-credit-payments-in-2021

see this IRS webpage which should allow you to update bank info for August payment

https://www.irs.gov/credits-deductions/child-tax-credit-update-portal