Syntax error Python Type conversion how do I fix this Line 2

Question

CurrentYear = 2019
year int(input("what year were you born"))
if year = int(year)
age = CurrentYear - year
print("you are turning",age,"This year")
else: print("Invalid year")

Answer 1

Refer to the code...
https://code.sololearn.com/cBYN20hmetbF/?ref=app