I'll help void your check from a prior period, @.cfrllcfl.

You can create an offsetting entry to void the check-in another period. Let me walk you through the steps:

First, print the transaction that you want to void. This will serve as your reference when creating the journal entry. Here's how:

1. Open the transaction you want to void.
2. Select More, then select Transaction journal from the pop-up menu.
3. Keep selecting the Print (printer) icon until you get to the Print page.
4. Select Print. 

Once done, follow these steps to create an offsetting entry: 

1. Click the + New icon and select Journal Entry.
2. In the Journal date field, enter the date you want to show the transaction as reversed.
3. Enter the accounts in reverse based on the printed transaction journal. Example: If the transaction you want to void is a check, debit the bank account, then credit accounts payable.
4. Select Save and close.

Please take note that these two transactions can be reconciled in the next reconciliation since they add up to zero and don't change the balance when combined.

If you want to clear the transactions in the register, you can proceed to these steps:

1. Select Accounting from the left menu, then click Chart of Accounts.
2. Under the Action column of the bank account, select View register.
3. Find the original transaction.
4. Double-click on the space under the Reconcile Status (✓) column until C (for Cleared) appears.
5. Click Save. Repeat these steps to clear the reversing entry.

 
I've also included articles that will guide you in voiding your transactions in the future: 

• Void a transaction in another period.
• Void or refund transactions in QuickBooks Payments.
• Void or delete transactions in QuickBooks Online.

In case you have more questions or concerns, tag my name in the comment section. I'll be more than happy to assist you. Have a great day ahead.