While this process will depend on the VW model you have, there is a general process to turn off the tire pressure monitoring light. Once you properly inflate your tires, the light should disappear. If it doesn't, there are a few ways you can get it to go away.
1. Drive above 50 miles-per-hour for 10 minutes.
2. With your VW turned off, put the key to the "ON" position, but don't start it. Hold the TPMS reset button until the flashing tire pressure light blinks three times. Release the reset button and start the car. It should take about 20 minutes for the sensor to refresh.
3. Inflate all tires, including the spare, to 3 PSI over the recommended amount. Deflate them completely and then reinflate to the correct PSI.
4. With your VW turned off, disconnect the positive battery cable. Turn the car on and honk the horn for three seconds. Then reconnect the battery.