Here is the trick. Change your GP user date to a date in the last payroll year.
Go to Transactions – Payroll – Void Checks.
Select the check number to void. As a general rule you would want to void the check from the employee in the year in which the wages were paid, in this case last year. This is the Check Date field and is required. Since you changed the user date you can now override the date.
The Posting Date is the general ledger date. As a general rule that would be a date in your current fiscal year. Check with your CFO or accounting manager to determine the correct period for posting.
Click the Void check box next to the check and Process. The wages, deductions, and taxes will be backed out to the previous years payroll information. The general ledger will be reversed in the current year.