Audacity 2.x is well documented with a full user manual, an online wiki, Tutorials and other useful resources.
Frequently Asked Questions (FAQ)
For self-help, a good place to start is the Frequently Asked Questions (FAQ) in the online version of the Manual.
The Manual is already included with the Windows .exe or Mac OS X .dmg installers for the latest 2.x version of Audacity . Look in the Audacity Help menu for the Manual. The Frequently Asked Questions are also included in the built-in Manual.
Searching the Audacity Manual
The most convenient way to search the Manual is to search the online version of the Manual. Bookmark this link: http://tinyurl.com/lytq5hd . Replace "Device Toolbar" in the address bar with what you are searching for.
The Audacity Wiki
The Audacity Wiki contains a wealth of information about using Audacity.
The main page: http://wiki.audacityteam.org/wiki/Audacity_Wiki_Home_Page
Tutorials in the online Manual: http://manual.audacityteam.org/o/man/tutorials.html
Additional tutorials in the Wiki: http://wiki.audacityteam.org/wiki/Category:Tutorial
A collection of articles on the Wiki to help you work with and understand Audacity and your audio hardware.
Nightly alpha development builds of Audacity.
Development of Audacity continues all the time. You can download the latest alpha development build of Audacity and let us know of any issues you find (or give us feedback about its features). The Manual for alpha development builds is online at http://manual.audacityteam.org/man/ .
Audacity Web Site
Home Page: http://audacityteam.org
Audacity Download page: http://audacityteam.org/download/