If it was a rental or you otherwise claimed a depreciation deduction (e.g. home office), you will be taxed only on the depreciation recapture. Since there was less than 5 years between moving out and selling** , you do not have to reduce your $50K exclusion for the period non qualified use.
In TurboTax, at the page where it asks if you had any other use of the home it says: "Note: if you used your home for reasons other than primary residence, after it was no longer your primary residence, select 'no'''.
When you enter the home sale in Turbotax (TT), and follow the interview carefully, TT completes the "Home sale work sheet" to handle that complex calculation of the partial home sale exclusion, non qualified (rental) use capital gain and depreciation recapture.
Example: you bought the home for $50K and sold it for 100K. During the three years you rented it, you claimed (or should have claimed) $4000 in depreciation. You actually have a $54K profit. Only $4K will be taxed. Depreciation recapture is taxed at your marginal rate, but not more than 25%. $4000 x 12% = $500 tax (+/-)
** A different 5 year rule -- "Any period of nonqualified use does not include: any portion of the 5-year period ending on the date of the sale or exchange after the last date you (or your spouse) use the property as a main home"
