I have cleaned up the worst of your formatting; you had lines too long and too many empty lines, which actually detract from legibility. I have sorted out some of those things; look at lines 36‑41 to see how it should be done.
public static void main(String args) ... As you have already been told, don't add the additional spaces.
public static void main (String [ ] args) ... You also have some inconsistent indentation, which I haven't the time to correct, possibly caused by your mixing tabs and spaces. Despite what the old Sun style guide says, don't mix spaces and tabs. Use a decent text editor (my favourite on Windows is Notepad++) and set up automatic indentation and automatic conversion of 1 tab → 4 spaces. I might sound all anally‑retentive about formatting problems, but you need to be able to read your own code easily. If you don't format it correctly and consistently, you will overlook serious errors because you are misreading your own work.
I shall tell you the old‑fashioned method of debugging. Start by putting a print instruction where you read N/P/I:-
System.out.printf("You entered %s%n", input); and a similar instruction one line before “return tuition;”:-
System.out.printf("Tuition = %.2f%n", tuition); If those two don't show where the problem lies, write a similar line isnide each if statement in the method to calculate tuition.