your handbrake will be ajustable in two ways.
1. you will find 1 or 2 nuts at the back of the handbrake itself, you will need to make sure your handbrake is off before you adjust. if it is just 1 nut tighten it and if it is 2 you will need to spin them in opposite directions.
If your car does not have option 1 then option 2
2. Underneath the car there will be a cable that runs down the centre towards to back wheels it will split into 2 and go to both back wheels you will find nuts to be ajusted on the cable.
Hope this is of some help, happy repairs
Jay
September 2008