Hi Eveyrone,
How can I generate a report showing me number of incidents closed per day.
Here is an interesting discussion on similar topic...
https://answers.splunk.com/answers/392089/ticket-analytics-how-to-chart-open-tickets-over-ti.html
You provided little information to work with so I'm just making a guess, but here it is.
mysearch | timechart span=1d count
If you run that over a reasonable time span (one week through a year or so) it should get what you need. Replace mysearch
with the search that gets you the list of incidents.
You'll need to provide a bit more information.