I am unable to enter expenses through the expenses page. If I put in existing supplier it brings up last payment amount but unable to edit it. Unable to enter new lines

I'm glad you came here, @poolpro11. Let's ensure you can enter expenses in QuickBooks Online (QBO), lulujen1.

We can perform some troubleshooting steps to fix this. There are times when the browser is full of frequently accessed page resources, which causes some errors or unusual responses. 

Let's start accessing your account using a different or private browser. You can use either of these shortcut keys:

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

Once logged in, try to enter expenses. If it works, I recommend clearing your browser's cache. Doing so will remove the historical data and access QuickBooks with a clean slate. You can also switch to a different supported browser.

Please refer to this article for more details about managing expenses in QuickBooks: Enter and manage Expenses in QuickBooks Online.

Consider me your ongoing support if you need further help managing expenses in QBO.  Assistance is just a post away.