Cash benefits from what? You probably will get a 1099R form for it. The 1099R forms are just starting to go out so keep waiting for it. Or you might be able to log into to your account and download a copy.
If you get a 1099R Enter it under Federal Taxes on left Wages & Income Then scroll way down to Retirement Plans and Social Security Then IRA, 401(k), Pension Plan Withdrawals (1099-R) – Click Start If you are adding another 1099R there might be a Add button at the bottom of the list.