Hi Jessica2300!
Thanks for joining us here. Let me how to attach a PO to a paid bill.
Let's find and open the bill first. Then, click the Select PO icon or the Select Related Transaction button. There'll be a pop-up where you can select an existing PO. Find the PO and tap OK to link it.
If it adds new line items instead of replacing the old ones, you can simply remove the old line items. Make sure that the total is still the same amount and has a Paid status. Then, tap Save & Close.
You'll want to check this link: Accounts Payable workflows in QuickBooks Desktop. This will show you how to track the money you owe your vendors.
Do you need vendor-related reports? Here's an article for you: Customize vendor reports.
Keep on posting here if you have other concerns. Take care!
