Web portal
Create or edit an existing record
Click the duplicate button in the top right corner
Confirm you want to duplicate the record
You will be taken to the duplicate record
Apps
Go to existing records
Tap on the record you wish to duplicate (downloading it first it is not already downloaded)
Select the duplicate
Any duplicates created will have matching data and will be assigned to the same customer /Job address by default. It is recommended that you rename either the duplicate or the original to avoid confusion. Read about how to do this here - need proper link