can you delete an adjustment cheque?

Welcome to the Community, @userinvoicing.

Yes, you can delete the adjustment cheque. However, please note that once you void or delete a check, any reports that include that transaction also will change. I suggest contacting your accountant for more accurate information. Below are the steps to void and delete a check.

To void a check:

1. Open the check-in in the Write Checks window.
2. From the menu, select Edit > Void Check.
3. Note that "VOID" has been inserted within the Memo field. Type any additional details about the transaction within the Memo field. Indicating the reason for the voided check will help explain any missing checks once you reconcile the bank account.
4. Review the voided transaction, then click Save & Close.

To delete a check:

1. Open the check-in in the Write Checks window.
2. From the menu, select Edit > Delete Check.
3. In the Delete Transaction popup, click OK. The check is now deleted from your records and can't be retrieved.

For your future reference, you can check this article on how to print the checks: Print a check in QuickBooks Online.

Feel free to reach us out again, if you have further concerns.