In Merging multiple bank accounts - what happens to the potential duplicate transactions?

Good afternoon, @victoriako-finan. 

Hey newcomer! Thanks for reaching out to the Community with your question about merging bank accounts in QuickBooks Online. 

If you have potential duplicate transactions, I suggest excluding them from the account. This guide will provide you with the steps on how to do so. 

If the duplicate transactions keep coming in, then I recommend contacting our Customer Support Team to ensure this isn't an on-going investigation with the system. 

I hope this helps. Feel free to reach back out if you need me again. Take care!