Enter 0 for future earning. This'll give you a quick estimate.
Enter your date of birth (month/day/year format) 01 / 01 / 1960
Enter earnings in the current year: $ 100000
Your annual earnings must be earnings covered by Social Security.
Now click on "Submit Request"
On the next page: click on "See the earning we used"
Enter '0' for 2013 & Beyond. You can also put your actual data here for previous years if you've:
Click on "submit earning information"
This'll give you revised benefits for your specific case.