Thanks for getting back to us, @chart. 

As mentioned by my colleague above, QuickBooks will retain the payment and apply the credit to the next taxable period. That means, voiding old transactions automatically apply the credits to the open Sales Tax filing period. Keep in mind that it doesn’t affect the prior paid sales taxes. 

To void the said invoice in QuickBooks Desktop, make sure to switch to single-user mode first. Then you can follow these steps:

1. Go to the Accountant menu and select Batch Delete/Void Transactions.
2. Choose Invoices under Transaction Type.
   
3. Select the transaction you want to void from the available transactions list.
4. Click Review and Void.
5. Select Back Up and Void. You can also avoid the backup and select Void just from the dropdowns.
6. Press Yes to affirm you want to void the event.

You can use the Audit Trail feature or the backup copy to keep track of the details.

In case you still need assistance personally when performing the steps, feel free to reach out to our Customer Care team. 

Please do let us know if you still have concerns with managing your invoices in the program. We’ll be here to help you always.