In AP payments, we can see vendor ZIO000 has two “invoices” that offset each other, but the system is unable to match them because the invoice numbers are different. Because the system is unable to clear them for you, you can accomplish this using AP inquiry under the Accounting tab.
Within AP inquiry, pull up the vendor in question and note the invoices that need to be applied against each other. They are currently separate entries in the grid. To let the system know these should be matched against each other, take the payment entry line and select it.
Note a box appears above the grid “Apply to #’. Change this to match the invoice it is paying against (in this case invoice 123456) and see a green checkbox appear. Click the green checkbox to apply the change. Note the invoices are now paired as one entry and balance to zero.
Once you update them to match and you see them net to zero, select File > Roll current to history. It will go through open items and flag items that net to zero as history so they will not appear in the current data.