I am receiving a payment and posting it to set invoices. However its posting to the wrong invoices every time? How to fix?

I appreciate your interest in correcting your payment invoice in QuickBooks Online (QBO), jlee5855.

Based on the information you've provided, it appears that the payments you made were applied to a different invoice than the one you intended to pay. To fix this, I suggest that you first turn off the automatic apply credit feature in your QBO account and then unlink the payment from the incorrect invoice. Once you've done that, you can apply the payment to the correct invoice. Let me know if you need any further assistance.

If you set QuickBooks to automatically apply for payments, your payments will be automatically posted to the oldest open invoice. Some businesses may not want payments posted in this order. Performing the following steps will re-apply payments to the correct invoices without affecting your reconciliation.

Here's how to do it:

1. In QBO, go to the Sales menu at the left pane to get to the Customers page.
2. Click the customer's name to open the Transaction List.
3. Locate the payment and select it to open.
4. Rename the customer and enter the amount.
5. Hit Yes to confirm. The customer will have an unapplied payment which you can either delete or apply to future invoice(s).

Once done you can link the invoice to the payment and delete the incorrect payment.

Also added this article that tackles how to let customers pay their invoices online moving forward: Take and process payments in QuickBooks Online.

Please comment below anytime if you have other questions or concerns about receiving payment invoices. I'll be keeping an eye on this. Keep safe!