To add a payment method:
- Open the "Google Play" store
- Click on the menu icon (the 3 lines on the left of the screen) then "payment methods."
- Click "Add Payment Method"
- Choose the payment method you want to add, then follow the instructions.

To remove a payment method:
- Open the "Google Play" store
- Click on the menu icon (the 3 lines on the left of the screen) then "payment methods."
- Choose more payment methods.
- Login if prompted.
- Choose the payment method you want to remove, then click Remove.
This is how you remove the payment method from your Google account.

To edit a payment method:
- Open the "Google Play" store
- Click on the menu icon (the 3 lines on the left of the screen) then "payment methods."
- Choose more payment methods.
- Login if prompted.
- Choose the payment method you want to modify and click Edit.
- Make your changes and follow the instructions.

Please see the Google Help Center articles for more information about these options.