What year is your Corsa?
3 or 5 door?
Which engine is fitted?
What is the tyre size?
All these things make a difference to the tyre pressures. The tyre sizes range from 145/80/13 on the really early models, to 225/35/18 on the current Corsa VXR Turbo model.
More information is required in order to help you I'm afraid.