Hi mkitchens,

Welcome to the QuickBooks Community. I'll be happy to help you find your credit memo.

There isn't a hint if a particular credit memo is the one you look for, so try to remember which customer was it. Then, check the credit memo transactions of that customer and open them one by one. See the transaction history by pressing Ctrl+H to find out which invoice a particular credit memo was applied for. This will at least help you remember if it's the right transaction.

Once you find the right credit memo, delete, recreate, and apply the recreated one as payment to the right invoice.

I also want to add for your reference in the future that credit memos can be turned into a refund. Check out the detailed steps in this article: Give your customer a credit or refund in QuickBooks Desktop for Windows.

Feel free to comment below if you need more help with finding your credit memo. Take care and have a good one!