Currently bills received through Viewpost do not move to "Closed" after payment has been made.
When payment is synced for a bill on Viewpost, the payment is listed on the bill below the total, but the invoice remains in Approved Open Status.
To close the bill, Record a Payment on the bill.
NOTE - After you Record Payment, the Paid amount displayed on the bill is the actual payment made plus the payment recorded. No transaction will be created in Quickbooks Online when a payment is recorded.
We hope to have this problem resolved quickly!