You can duplicate a Form within the Forms module in your Incident Management account. To do this go to Forms in an open channel
Double click into the form you wish to duplicate
Click on More Options [⋮]
You now have a copy of that form
The new form will have (Copy) at the end of it's name, you can rename it from the More Options [⋮] menu
Example: You might have a Missing Person Report Form. You log an incident / event involving 3 missing persons. You can duplicate the form and create Missing Person Report 2 / Missing Person Report 3 etc.