Let me walk you through getting those billable items from last year., HelenZhang.

You'll want to filter the date when you create an invoice. And, QuickBooks will show all open transactions associated to the customer.

I'm glad to show you how to accomplish this:

1. Click + New, then choose Invoice.
2. Enter the name of the customer in the Customer field.
3. Click the arrow at the right side of the page.
   
4. Filter this form by All types and All dates.
   
5. Then, you'll see all pending transactions.
6. You can then select which one to add.

If you aren't seeing the billable item you want to create, it's possible this entry was already created before. You can pull up the Transactions List by Customer report. Then, customize it for a specific customer only and review all transactions.

Let me know if you need anything else by commenting below. I'm always around to help.