Hi there, @Madinfla.

I'd be glad to help you display the customer's name on invoices. We can perform some troubleshooting steps to fix this. 

There are times that the browser is full of frequently-accessed page resources, thus accumulating and corrupts the browser cache causing the runtime user interface to malfunction.

To start, access QuickBooks account using a private/incognito browser. You can use the shortcut keys below:

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

Once you're in, create an invoice again to check if it works. If the name is displayed on the invoice, we'll go back to your regular browser and clear the cache to get rid of the stored junk files.

If the same thing happens, you can use other recommended browsers. It could be that the one you're currently working on has a temporary issue with QuickBooks.

Also, I've added this article that can guide you in creating and sending invoices in QuickBooks Online.

Please let me know if you have other queries about managing your invoices. I'm here to help. Have a great day.