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You'll have to sign in to your QuickBooks Online (QBO) account using a web browser, @dcrumpler1996.
As a result, QuickBooks will start depositing customer payments into the new checking account.
Here's the link that will provide more info about the process: Change the account QuickBooks deposits payments into.
Also, if in case you want to change the way QuickBooks categorizes payments on your chart of accounts, see this article for the detailed steps: Choose where to record payments and processing fees for QuickBooks Payments.
Please let me know if I can be of additional assistance with changing checking accounts in QuickBooks. I’ll be here to help. Have a good one.