In addition to User Profile information, you can create Custom Data Fields for additional personal information your organization wishes to gather from a user when creating an account.
Important Note:
The custom field will not show up as an option in reports until it has been filled out by at least one account member.
Instructions
Navigate to Configurations > Organization > Custom User Fields
Select Create Custom Field
Fill in fields
Data Type: Select what type of answers you want to retrieve
Label: Enter a label for your field
Max Length: Specify how many characters are possible in an answer; leave blank for unlimited
Required: Select if this field is a required field
Select Save New Custom Field