We're glad to have you here in the Community, HometownSC. I can share insights about merging accounts in QuickBooks Online (QBO).
If you encounter duplicate vendor accounts, you can merge them to combine all the data into your desired account while deactivating the duplicate. Please know that this action is permanent. You can't change it at a later time. If you wish to proceed, here's how:
Navigate to the Expenses tab and click on Vendors.
Choose the vendor profile you want to retain, then click on Edit.
Take note of the Company name and Vendor display name for reference.
Return to the Vendors tab.
Find and open the vendor profile you want to merge, then click Edit.
Modify the name to match the vendor you are merging it with.