Currently Being ModeratedMar 4, 2012 12:38 PM (in response to molnar.rk)
You can turn off auto-correction for typing via Settings > General > Keyboard > Auto-Correction and Check Spelling :
Turn Auto-Correction on or off: Choose General > Keyboard and turn Auto-Correction on or off.
Normally, if the default keyboard for the language you select has a dictionary, iPad automatically suggests corrections or completed words as you type.
Check spelling as you type: Choose General > Keyboard and turn Check Spelling on or off.
Currently Being ModeratedDec 12, 2013 1:51 PM (in response to jellero)
If you are looking for AutoFill (a feature in Safari that fills out forms and passwords using your contact information), it will be in the Safari preferences. If you are looking for Auto-Correct, it should be in General>Keyboard.