I posted a paycheque twice in the previous fiscal year, which has since been closed, and the cheque is still sitting in the Chequing Acct, unreconciled, along with a couple other prior year cheques. Because the books have been closed, I don't know how I should proceed to correct the errors because the Accounting Program won't let me go back to reverse the paycheque, and also because I don't know if it's okay to change account balances once the accountant has finalized Year End procedures.

I posted a paycheque twice in the previous fiscal year, which has since been closed, and the cheque is still sitting in the Chequing Acct, unreconciled, along with a couple other prior year cheques. Because the books have been closed, I don't know how I should proceed to correct the errors because the Accounting Program won't let me go back to reverse the paycheque, and also because I don't know if it's okay to change account balances once the accountant has finalized Year End procedures.

Simple enough you use a journal to clear these transactions out and you post them to a prior period adjustment account