Thanks for reaching back out to the Community, @DonnaSanchez. I'm here to help you merge the duplicated vendors.

At the moment, merging duplicate vendors would need to be done individually.

Here's how:

1. Select Expenses, then Vendors.
2. Choose the name of one of the duplicate vendors, then select Edit.
3. Change the Title, First name, Middle name, Last name, and Suffix to make it identical to the vendor you're merging with. Ensure that the Display Name is also the same.
4. Click Save, then Yes to confirm that you'd like to merge the two vendors.
5. Repeat this process for the remaining duplicated vendors.

For more information on how to merge list items in QuickBooks Online, check out this article: How to merge accounts, customers, and vendors

I'm only a reply away should you have any other QuickBooks questions. Have a great day!