Merge duplicate Account records
Identify the duplicate account records
Update the name on one of the records to match
Go to the Accounts tab
Click on "Merge Accounts" under the "Tools" section
Search for the records you want to merge
Select master record and data
The master record is generally the record that was created first - it is most likely to have the most data and be linked to other records in Salesforce. You can select any data from the duplicate record that should replace/update data in the original record.
Confirm the record merge
Once you click "OK," you will be taken back to the Accounts tab.