=IF(C4="","",IF(C3="parttime",0,LOOKUP(DATEDIF(C4,TODAY(),"m"),{0,3,96,180;0,10,15,20})))
I have this formula the second part works but they first part has changed
If you are a part timer you only get 4 days vacation after a year there before they didn't get any
c4 is the the start date
if...