When trying to make new invoice, keeps saying make a valid entry ????

Thanks for taking the time to reached out to the QuickBooks Community, ray14.

I'm here to help resolve the issue when creating an invoice in QuickBooks Online (QBO). 

I've checked my resources to verify if there's an on-going issue about the valid entry when creating an invoice, but we have no reports of any.

In this case, let's perform troubleshooting steps by opening your browser in incognito/private mode. This mode doesn't use the existing cache data files to load a webpage. 

Here are the keyboard shortcuts to open a private browser: 

• Google Chrome: press Ctrl+Shift+N 
• Mozilla Firefox: press Ctrl+Shift+P 
• Internet Explorer: press Ctrl+Shift+P 
• Safari: press Command+Shift+N 

If you're able to create an invoice successfully with a private browser, I suggest clearing your browser's cache to start fresh. 

For additional reference, you may want to check this article on how to create an invoice.

Please let me know how it goes. I'm always here to help if you have additional questions about creating an invoice. Have a good one.