What is wrong in this code coach problem(kaleidoscope)?

Question

n=int(input())
def tax(p):
cs=(7/100)*p
cost=cs+p
print(cost)
return
if(n==1):
tax(5)

else:
l=n*5
dis=(10/100)*l
dis=l-dis
tax(dis)

Answer 1

Ohh,,,I forgot to delete,,,actually I was trying different math function in it,,but all gave me fail cases,,in this code only 2test case got failed.

Answer 2

But it don't effect the working of the code..

Answer 3

But why did you import math if it has no use in the code