It's great to have you here, @PermDude.
Yes, QuickBooks Desktop have the Advanced Search feature which allows you to search for transactions using the memo you've entered. Let me guide you on how to do it.
Go to the Edit menu.
Select the Advanced tab.
In the Filter box, pick Memo.
Type in the Memo you've entered.
You can also filter the transactions to show only the invoices.
Keep me posted if you have other questions. I'm always here to help.
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