How do I void a lost check from a closed fiscal year in QuickBooks Online and unlink it from its original invoice so that I can link the newly issued check to that invoice?

To ensure I provide the most accurate resolution, could you confirm whether the check was issued to pay a vendor or received from a customer as payment?

Since this involves a closed fiscal year and a reconciled transaction, I recommend consulting your accountant first.

If you're dealing with a vendor bill, void the check in the current year. This keeps your closed-year books and historical reconciliations perfectly intact.

Here's how to do it:

1. Locate and open the original 2025 check.
2. Manually change the date to 2026.
3. Click More at the bottom of the screen, then select Void.

If your 2025 books are locked, an admin must input the closing date password to authorize this change or temporarily adjust the settings.

Once the bill has reopened, you can link your newly issued check to it by following these steps:

1. Go to + Create, then Pay bills.
2. Select the open bill, and apply your new check to it.
3. Hit Save and close.

If you're replacing a lost check that a customer used to pay an invoice, void it in 2026. QuickBooks will automatically unlink it from the entry, and the status will change to unpaid.

From there, you can apply the new check to the invoice.

Additionally, please be aware that during your next reconciliation, you will see the voided transaction as uncleared. Mark it as cleared, and your reconciled balance will remain intact.

This thread will stay open for any additional questions. We're always here to help. 

The thing is that in 2025 a check was lost but it was linked to the corresponding bill and the transaction was reconciled before closing the fiscal year.

In 2026, we confirmed that the check never reached its destination. We now in 2026 have issued a new check . However, the original bill is still linked to the lost check. How can I resolve this issue and link the new check to the bill registered in 2025 (already closed fiscal year) so that it once again appears as paid with the new check?
In addition, I cannot use the administrator advantages of our company’s account: Is there any way to proceed without the account password???
 

Voiding a check from a closed fiscal year requires careful handling because it can affect your financial statements and reconciled accounts. If the original check is linked to an invoice or bill payment, simply voiding it may not automatically unlink the transaction.

Before making any changes, verify whether your books are protected by a closing date or if the prior year's tax return has already been filed. In most cases, it's recommended not to modify transactions in a closed period without consulting your accountant. Instead, you may need to record a replacement transaction in the current period while preserving the historical records.

If you must void the original check, remove its link to the related transaction (where applicable), create a replacement check, and reconnect it to the original invoice or bill payment. Afterward, reconcile your records to ensure your accounts remain accurate.

If you're unsure of the correct approach, a QuickBooks expert or accountant can guide you through the process to avoid affecting your prior-year financial statements.