Go to Patrons module on the homepage.
The + Quick add new patron is shorter, usually around five fields, but can be as long as the library needs. The aim of this form is to get new patrons registered quickly. Accounts created using this feature can be edited at a later point when library staff has time to add more data.
In both situations, fields marked in red are mandatory and fields in black are optional.
In both cases it is a good idea to make the card number field mandatory for a number of reasons.

It is possible to change the library card number after it has been assigned.
If you leave the username and password field blank, Koha will automatically fill them in.
The username will be made up of a composite of the first and second name fields, or the email fields, depending on what has been filled in.