One option to add a checkbox Boolean field on Incident . Write a workflow on Incident history checking say Action ~= say call out then check box.
Now us this field + status change validation rule. Basically confirm note was added - then use that to allow change of status. Test on sandbox.
what i meant is i created text field.
i want that is someone change the status to specific status he will be forced to write reason for this change.
i am not so good with creating the code.
it will be great if someone can help me with that.
your validation rule should have this look :
Status = your_Status,
Hope it helps,