Hello @skonduru,

When categorising your banking transactions, the Find Match or Find Records function will appear and you're able to click it once QuickBooks recognise any existing transactions. Since it did not show up on your end, will have to make sure that the amounts and dates of your existing payments matches with the transactions you have imported.

Lastly, here's an article you can read to learn more about how you can review a transaction in your bank account register: Find, review, and edit transactions in account registers.

Keep me updated in the comments if you have any other questions. I'll be here to lend a hand.