I only take social security and and $31.22 in a gas royality. Why can't I use the free Turbo Tax?

Unfortunately, the gas royalty uses a form that is not supported by the TurboTax Free program. 

Situations not covered in TurboTax Free Edition include:

• Itemized deductions
• Business or 1099-MISC income
• Stock sales
• Rental property income
• Credits, deductions and income reported on schedules 1–3, such as the Student Loan