Trying to set up account, but error message -90 appears when I try to save?

This error could be a browser-related issue, jo-partridge-liv.

The outdated stored cache can affect the performance of QuickBooks Online. I'd recommend editing the company details via a private window to resolve this.

Here are the keyboard shortcuts: 

• Safari: Command + Shift + N 
• Google Chrome: CTRL + Shift + N
• Mozilla Firefox or Microsoft Edge: CTRL + Shift + P 

If it works, I'd suggest clearing the browser's cache to improve the program's performance. You can also use other supported browsers as alternatives.

Additionally, I've added an article that'll help you modify and manage your QuickBooks Online subscription: Payment Method.

Please keep us posted if you need additional assistance changing the settings in the program. We're always here to help.