Not really sure what you are looking for. You do not have to enter on a tax return that one of you is retired. If your spouse received retirement income--like Social Security or pension income, or distributions from a retirement account--that income must be entered.
As for "occupation" -- if you want to use "retired" as his occupation you can enter that in My Info if you want to . The IRS does not use occupation for anything that affects your tax due or refund. It is only for statistical purposes.
Do you need to enter retirement income?
Do not try to enter your SSA1099 or RR1099RB as a W-2. 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.
The Question may have been part of the "Guide Me" interview
In no way does that stop you from dealing with the various income items, deductions, credits etc, as long as you carefully go thru the full set of software menus . (especially if you get out of the "Guide Me" ). Even if you said NO to having Interest or Investment or Retirement Income in that Guide Me set, you can go back to that page at any time before you actually file, to add in Any & All income items you may have from the full menu...and then go thru the various credits and deductions too...
IF you don't see the full menu of income items below the top box of what you have entered already, you may be in Guide Me mode. Get out of that and find everything you need to enter (in the "Personal" income section for you SE users). These pictures are from "Premier" , your SE Version has some different tabs at the top, but the rest should be similar: