Going back and forth isn't easy, @nduffy.  I'm here to ensure you'll get the help you need about clearing off accounts payable transactions. 

Make sure to consult your accounting professional before trying these suggested resolutions. 

Let's start by writing off the amount for AP by creating a General Journal Entry. 

1. Open the Company menu, and click on Make General Journal Entries.

2. From there, edit the date and fill in the entry number if needed.

For vendors with underpayment: 

• Choose the Account field and hit Accounts Payable from the dropdown.
• Fill in the amount under the Credit column, go to the Name column and pick the vendor name from the dropdown.
• Proceed to the next line and choose the offset account and type in the amount under the Debit column.

For vendors with underpayment:

• Choose the Account field and hit Accounts Payable from the dropdown.
• Fill in the amount under the Debit column, go to the Name column and pick the vendor name from the dropdown.
• Proceed to the next line and choose the offset account and type in the amount under the Credit column.
• Once done, click on Save & Close.

After that, you'll want to link your journal entry to your bills to fix the balance. Here's how:

1. Open the Vendors menu and click on Pay Bills.

2. On the pop-up box, choose and put a check to the open bill you want to apply the credit you've created using a journal entry.

3. Select the Set Credits button. From the Credits tab, select the credit and tap Done.

4. Lastly, click on Pay Selected Bills.

For more details about the steps, check this handy article: Write off customer and vendor balances.

I'm also adding this guide in case you're ready to review and make sure your accounts are balanced: Reconcile an account in QuickBooks Desktop.
 

You already know where to find me if you need more assistance handling reports/balances. I'm also available for queries about QuickBooks in general. Take the best care!