HEY , GREETINGI JUST WANNA ADD ANOTHER PAYMENT METHOD AND REMOVE THE FIRST ONE? BUT THE ERROR WE SEE HERE IS "UNABLE TO PROCESS TRY IT LATER"!

Good day, Newa.

Let's ensure you can add another payment method and remove the other one without errors.

First off, I appreciate you for sharing the error message shown on your end. However, I'd like to know where specifically you add and remove a payment method in QuickBooks Online (QBO).

In the meantime, you can perform some basic troubleshooting steps. Let's start by accessing your QBO account via an incognito window or private browser to abstain from storing cache files that cause odd behaviour when running a web-based program.

Check out the shortcut keys below: 

• Google Chrome: press Ctrl + Shift + N
• Mozilla Firefox: press Ctrl + Shift + P
• Microsoft Edge: press Ctrl + Shift + N
• Safari: press Command + Shift + N

Afterward, delete and add the payment method there. Once this works, you can clear the cache of your default browser to remove outdated data files. 

Also, you can utilize another supporter browser or device if the one you're currently using doesn't work because it has a temporary issue with the program.

Additionally, to further guide you in managing your QBO account, whether you need to update the card on file, change your subscription, or view your billing history, you can refer to this article: Update billing, payment, and subscription info in QuickBooks Online. 

You might want to set up a currency for your customer. Check out this article: Assign a foreign currency to a customer in QuickBooks Online.

I'm all ears if you have additional concerns about the payment method in QBO. Please don't hesitate to comment below; I'll gladly help. Take care, and I wish you continued success.