See also JIRA Best Practices
Registering in Jira
Before you can report any bugs, you need to create an account in Jira.
...
Fill out the registration form completely and submit.
Browsing
There are several ways to browse the bug reports in Jira.
...
The "Find Issue" page allows for the creation of a custom query.
Creating a New Bug
Login, if you haven't already done so.
...
In step 2 of 2 you will need to fill out the form and click the 'Create' button to complete. See the "Reporting Bugs" section above, for necessary information to include here.
...