Importing customer payments

I appreciate the complete details you've shared, @25Nick.

Currently, the ability to link imported payments with your invoices is not available. You'd have to manually mark your customer's invoice as paid.

Here's how:

1. Choose Customers at the menu tab.
2. Select Receive Payment.
3. In the Received From the drop-down, then choose the customer's name.
4. Enter the payment.
5. Set the correct date, then select the Payment method.
6. Choose the invoices you'd like to pay. 
   
7. Select Save and Close.

Since you already imported the invoice payments, it will become a credit. Here's how to manually link the credit to your customer's open invoices:

1. Open the deposit, then change the account to Accounts Receivable.
2. Click Save & Close.
3. Open the invoice.
4. Select the Receive Payments button.
5. Click Apply Credits.
6. Go to the Credits tab.
7. Select the deposit, then click Done. 
8. Click Save & Close

You can read through this article for more detailed steps about the different ways you can track customer transactions in QuickBooks Desktop: Get started with customer transaction workflows.

Keep us posted if you have other questions. I'm always here to help.

@25Nick 

IIF doesn't support many transactions types. You need a 3rd party app to do so.

https:// transactionpro.grsm.io/qbd

https:// partners.saasant.com/affiliate/idevaffiliate.php?id=5051_2

You will prepare the Receive Payment data with the following template