Hi. How do I match a series of part payments to an invoice again?

Thanks for taking the time to post here in the Community, @diveotion. 

I'll share some options on how to match your partial payments to your invoice. 

If you've entered all the part payments through the Receive Payment feature, you'll have an option to apply them. Just open the invoice and click the Payments link under Receive Payment. Please see the screenshot below to serve as your visual guide. 

If you've recorded your payments through Bank Deposit, there isn't an option to apply them to the invoice. To help fix this, you'll need to edit the deposits on the register so you can link them to the invoice. Here's how: 

1. Go to Accounting from the left menu. 
2. Select Chart of Accounts. 
3. Locate the account you deposited the payments to, then click Account History under the Action column.
4. Find and choose the correct deposit, then select Edit.
5. On the Bank Deposit screen, go to the Add funds to this deposit section and find the fund you need to edit.
6. In the Received From column, select the appropriate Customer name.
7. In the Account column, choose Accounts Receivable or Debtors account. 
8. Click Save and close.

For more information, you can check out this useful article: How to Link a Deposit to an Invoice. 

If you're trying to match a downloaded invoice to more than QuickBooks transactions, such as part payments, you can click Find other records in the For Review tab. For detailed steps, please go through this article: Add and Match Downloaded Bank Transactions. 

The options above will help get you back on track, @diveotion. 

I'm always here to help if there's anything else you need. Have a good day.