I'll provide some details as to why you'll have to change your bank account for direct deposit in two spots, ML55.

With the process of changing your payroll bank accounts, it is important that you set up your bank account in your chart of accounts. This is to make sure your payroll transactions post to the correct register. 

Then, you'll have to change your bank account with the payroll service as well so you'll be able to connect your bank account instantly. After that, change your default bank preferences to ensure your payroll transactions and tax payments post to the correct account in your books. 

That's why you'll have to make sure to change the account for your Accounting preferences first before running the payroll to ensure everything runs smoothly without issues since this isn't automatic.

Moreover, after you're done with the process, you can now start assigning a pay schedule and creating paychecks so you can run payroll. To give you more complete information on how to do the process, check out this article for your guide: Create And Run Your Payroll.

Keep me posted if you need anything else about running payroll or changing bank accounts. I'll be right here if you need help.