Your Social Security "cost"? What do you mean? Are you asking about your statement of Social Security benefits received? Your SSA1099 that was mailed in January?
There is a way to go on the Social Security website and request one. Go to www.ssa.gov You have to create an account with a user name and password.
https://www.ssa.gov/onlineservices/
https://www.ssa.gov/myaccount/
Go to Federal> Wages & Income>>Retirement Plans and Social Security (SSA1099 and 1099RRB) to enter your SSA1099.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**