Hello there, jamieburnett.
I want to make sure you're able to add new customer in QuickBooks Online (QBO).
To check if it's browser related, let's process troubleshooting steps by opening your browser using incognito/private mode. You can refer to the keyboard shortcuts below:
- Google Chrome: press Ctrl + Shift + N.
- Mozilla Firefox: press Ctrl + Shift + P.
- Internet Explorer: press Ctrl + Shift + P.
- Safari: press Command + Shift + N.
Once done, try adding a new customer. If it works, then you can clear the cache and cookies of your regular web browsers. Here's an article for your reference: Delete or disable cache and temporary internet files in your web browser.
Otherwise, try using a different browser.
However, if the issue persists, you may need to reach out to our Customer Care Team so they can conduct further investigation.
To get their contact number, you can check out this link: https://quickbooks.intuit.com/uk/contact/.
Let me know if you got to try the recommended steps above and how it works for you. I'm still here whenever you need help.
