Remove the filler cap/dipstick from the reservoir. Withdraw without spilling the fluid using "fluid removal tool," Dispose as per applicable procedure for hazardous material, the spent fluid that you removed.Next, fill up to the recommended mark the reservoir. Take care of the "cold" or "hot" marked on the dipstick and accordingly fill up to the required mark. Now start the engine and move the steering for a few times from left to right a couple of times. On having done this make your final check of the level. This gives you the final level to which the fluid has settled.