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At this time, there isn't an option to turn off the auto-match feature in the bank feeds. QuickBooks tries to match downloaded transactions to any entries in your register automatically. You can review the matches before adding them to the register.

Also, QuickBooks makes a match if the bank feeds and the transactions that you've manually entered in the register have the same pieces of information (ex. check numbers, amounts, dates and payees). Here's an article that'll provide you more details: Add and match Bank Feed transactions.

You'll have to manually click the "Not a Match" option if QuickBooks automatically matches the bank feeds to the wrong transactions. 

We're always looking for ways to improve QuickBooks Desktop and we want to hear from you. Please send your feedback by clicking the Help menu then Send Feedback Online. This will make our product developer team aware of how you want the program to work.

Thank you for your time and helping us make QuickBooks Desktop a better product. If there is anything else we can do for you, please don’t hesitate to let us know.