I got Error code:-81623

Hello @uservalkovov,

Welcome to the Community. Let me provide some information about the error in QuickBooks Online.

You usually encounter the Error: -81623 message when updating your billing information. I recommend you perform some basic troubleshooting to isolate and fix the issue.

We can use a private browser to open your account and see if you can update without any problem. It doesn't use the cache, which stores data that creates browser-related issues. 

Use these keyboard shortcuts depending on the browser you're using:

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

If you can get past the error, please switch back to the regular browser and clear its cache & historical data. It helps to restore the default setup of the browser.

In case private browsing doesn't work, use other supported web engine to get the best and most secure experience with the program.

If all else fails, please contact our QuickBooks Support Team. One of them will take over and help you further with the necessary changes to your account.

Here's how you can reach them:

1. Open your QuickBooks account.
2. Click the Help option in the upper-right corner.
3. Select Contact Us.

For additional reference, I've attached a link you can use about how to change your billing info in QuickBooks: Update billing, payment, and subscription info in QuickBooks Online.

Fill me in if you have additional questions about the error code in QBO. I'm always here to help. Take care always.