It would be my pleasure to help you handle this recently cashed payroll check. The best way to handle this is to match it to the original QuickBooks transaction in the register. Since the check was never cashed, the deduction from the banking account was never received and therefore never reconciled.
Since the date of the check and the day it was deducted are so far apart, there may be a couple extra steps to properly match the transaction. Refer to the instructions below to accomplish this:
Manually Matching a Bank Transaction
From QuickBooks Online, navigate to the Banking tab and the For Review section.
Click the recently cashed check and select Find Match.
Find the QuickBooks transaction from several months prior in the list below and check it. You can use the filter tools at the top to help you narrow the list if needed.
Once the balance matches, click Save to match the transaction.
With these steps, you can manually match whichever transactions you need regardless of date or amount. Please don't hesitate to reach out to me here with all of your QuickBooks needs, I want to ensure your success. Thanks for coming to the Community, cheers to a grand 2019 ahead.