If you ever change your PayPal email, you'll also need to update that information on your Live Site so you can continue to receive payments to the correct PayPal account.
You can learn how to update your PayPal below.
What You'll Need
An existing PayPal account already configured as a payout method on your Live Site. For more information on setting up your payout method, see our help article Setting Up Payouts.
How to Do It
1. Navigate to your Live Site > Payouts tab.
2. In the Payout Methods section, press the Edit 
button next to the PayPal account you want to update.
3. Enter your updated PayPal email address.
4. Click Save.
That's it! Your PayPal account should now appear with your updated email address in your Payout Methods section.