Go to Settings -> Stripe
Manage account -> Log in
Click User in the top right -> Click on 'Salon App' under Payout
Click the edit button next to your current details -> Enter your account number and follow the instructions on screen to update
Common error - if you want to update the payout details to a new account for the same currency, make sure you click Edit, not Add. If you click Add, you will only be able to add accounts for other currencies. One account per currency at a time