Please Identify Yourself. Enter your My CS-Link access code exactly as it appears on your enrollment letter or your My CS-Link confirmation email. If you do not have a My CS-Link Access Code, you may request one online by clicking the Request Online button below. Enter the last four digits of your Social Security number. Enter your date of birth in the format shown, using four digits for the year. For example, Jan 21, 1967, would appear as 01/21/1967.