When putting in a new customer quickbooks takes me back to the main page. How can I fix this problem?

Hello there.

Let's resolve this issue and make sure you'll be able to add and search your customers in QuickBooks Online (QBO).

We can do some browser troubleshooting steps to find out if it's caused by too many cached files. We can start by signing in to your QBO company using a private window. This step will disable the extensions and stops the cache from saving your search history.

Here's how to access incognito mode in some of the most commonly used web browsers:
 

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

If you're able to add or search for your customers, it's safe to say that it's being caused by the browser. It can be fixed by clearing your cache and cookies.

However, if it's the same thing, please use a different browser to see if this only happens to the one you're using. 

Here's a list of supported browsers:
 

• Google Chrome
• Mozilla Firefox
• Safari 11 or newer

Additionally, here's an article I got for you in case you want to delete and edit your customer's information: Manage customers in QuickBooks Online.

Drop a reply anytime if you still have questions or concerns with regard to managing your customers in QuickBooks Online. I'll be here to assist you further. Take care and have a nice day ahead.