You can go now go to http://ssa.gov/myaccount
From there you create a passworded account for yourself with the SSA. You then login (remember your login details) and order which ever of the several documents you wish to download or order. In your case, you are going to look for the Annual Social Security Earnings Statement.
There are other helpful documents,including 1099s (once you start collecting), benefits verification, etc. You can change your banking info, your address, etc., should the need arise.
Note that the Annual earnings statement will have an estimate of your age 62 amount. Only an estimate. If you have 35 years of work earnings already, and your current income, if continued, would not have exceeded any of the prior 35 by much, then stopping work now will not greatly effect that age 62 amount.
For a more exacting number, you need to master the calculator, and input your Annual statement earnings figures you see, in the proper years' slots.
Note also that by choosing to collect at 62, you are choosing to collect 8 more years of benefits (8*12 = 96 monthly payments) than if you waited til age 70 to start collecting. The trade off is that your benefit is substantially less per month, permanently. So you want to make sure you can live on that amount if you have no other retirement income once you stop working forever.