Trying to update my payment. Get error message:?

It's my pleasure to help you fix the error while updating your credit card information, @webs2impress.

There are a few potential causes for this problem. One of them is if the firm address is incomplete within the Settings section of the QuickBooks Online Company tab.

Let's verify this by following these steps below:

1. Go to the Gear icon, then choose Account and Settings.
2. Click the Address section on the Company tab to edit it.
3. Check the Company address details and update them if necessary, then click Save.

If it's correct, I'd suggest contacting your card's provider to see if there's an error on their end.

If the error persists, I suggest calling our Customer Care team to review your account and help you fix it.

To make sure we address your issues on time, see our support hours.

Visit this link to learn more about updating your payment information for your subscription in QuickBooks Online.

If you need anything else, I'm here for you at all times. 

Its most probably the card provider's issue as I'm also running an online vape carts store where customers complains in the same way but when we inquire the situation, its always card providers fault. So better to contact them first and everything will be ok soon.