Tax Calculation

I entered approx. 80,000 in income:  approx. & 5k on wife's W2, 58k on our SS, 5.5k pension, 12k IRA dist. I did have a small capital gain loss this year.  No fed. tax was taken from any of the income.  Turbo is showing a AGI of approx. 4k and a tax of $413.  Can this be right?  Took the std deduction.  We are both 74 years in age.