Need to reset my oil service light on my john deere lawn mower can you tell me how?

Hi and welcome to FixYa. I am Kelly.
The light (blinking notification on digital read out) will come on 1/2 hour before and remain on for 1/2 hour after the interval. If you pass your model number I can paste the notification data. It is NOT re-setable.

How Does Your Hour Meter Function? Model Year
Model Number and Product Identification Number Groups. Is the tractor equipped with an hour meter? Does it accumulate hours with the key switch left "ON", but not running? How long does the service reminder (SVC) display before and after service intervals? Does the Hour meter stay lit or display hours when the key is in the" OFF" position? Does the hour meter only count hours when the engine is running?
2008 - 2011 D100 D110 D120 D130 D140 D150 D160 D170 LA105 LA115 LA125 LA135 LA145 LA155 LA165 LA175 Yes No half hour No Yes
^- This was a chart... It did not pst well at all. The key is that the interval underlined above is 1/2 hour before and after the service due period and it is NOT resetable.

Thanks for choosing FixYa,
Kelly