What are you trying to do? Are you asking what to say for "occupation?" The IRS only uses occupation for statistical purposes so you can say anything---it will have no effect on your tax due or refund. You can say "Retired" if you want to.
Or are you asking about how to enter your retirement income?
Go to Federal> Wages & Income>>Retirement Plans and Social Security (SSA1099 and 1099RRB) to enter your SSA1099.
To enter your retirement income, Go to Federal> Wages and Income>Retirement Plans and Social Security>IRA 401 k) Pension Plan Withdrawals to enter your 1099R.