HT4623: Update your iPhone, iPad, or iPod touchLearn about Update your iPhone, iPad, or iPod touch
Currently Being ModeratedFeb 8, 2013 5:18 PM (in response to Leahnpennini)
If you are using iOS 4 (or earlier) there is no Software Update in Settings. That feature was first added in iOS 5.
To update you will have to connect your iPad to iTunes on a computer (preferably the one you sync with and backup to).
See here: http://support.apple.com/kb/HT4972