Hi there, @VFAKathy. 

Glad to have you in the Community today. I'm here to share some clarifications about why your vendors' transactions show zero in open and $5000 as overdue.

To get this sorted out, you'll need to make a bill payment. Then link your deposit and vendor credit to zero out the overdue amount.

Here's how:

1. Click on the Plus icon at the top.
2. Under Vendors click on Pay Bills.
3. Under Outstanding Transactions check the box for the deposit and supplier credit.
4. Click on Save and Close.

I've added some screenshots to guide you through the process:

Also, you can check out these article below about, paying bills and handling vendor credits in QuickBooks Online for your future reference:

• How do I handle vendor credits and refunds?
• How to enter and pay bills?

These steps should help you remove the overdue amount on your vendors' transactions. 

Please feel free to let me know how it goes, as I want to make sure that everything is working fine on your end. Have a most pleasant day.