You can change your primary bank account.
However please make sure, you have added another bank account first.

Upon adding another bank account, you can change your primary bank account by following these steps : 

  • Tap on your "Settings" menu
  • Tap "Bank Account"
  • Tap on the bank account you wish to choose as the primary bank account. 
  • Tap "Set as Primary" at the bottom of your screen

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