How do reset emission light on vw golf 1.4 petrol

If you mean the service light here is the procedure.
Button #1 mileage reset button
Button #2 Clock adjustment button

• Switch ignition off
• Press and hold button #1 at bottom left of speedometer
• Switch ignition on and release button
• The text "service Oil or service INSP" will appear in the display window. On 2000 m, y, cars the message "SERVICE NOW" will appear in the instrument cluster with center display
• Turn button # 2 at lower side of tachometer to the right
• The service display shown in the display window is now reset and "service _ _ _" will appear in the display window
• Switch ignition off, service display is now set until next scheduled service interval is reached.