Money from retirement accounts does not have to be reported to Social Security. Are you confusing that with the requirement to report income from certain kinds of pension funds?
Are you confused about the Windfall Elimination Provision?
Windfall Elimination Provision (WEP)
If you are eligible for a
pension
based on work you did for a federal, state, or local government, a nonprofit organization, or in another country and you did not pay Social Security taxes, this pension can affect the amount of your Social Security benefits.