Hello, @bbibrett.
Let me help share some information about deleting memorized transactions in QuickBooks.
Normally, all transactions you've memorized and all transaction groups you've created should show on the memorized transaction list. From here, you should be able to delete the memorized transaction.
If you still have other created memorized transactions, can you please delete those? Once you're done, you'll need to recreate the transaction then select Memorize again. Let me route you to this article for additional information: Memorize transactions to save time.
Please let me know how it goes. I can provide further help if needed.
For related helpful articles you might want to check in the future, you can visit our QuickBooks site: https://quickbooks.intuit.com/community/Help-articles/ct-p/help-articles-us?label=QuickBooks%20Enter....
Should you have other questions about memorized transactions, please let me know. I'm always here to help.