Turbotax not deducting all realized longterm loss under $3000.

I sold some stocks ( not wash sales) and realized a longterm loss of -1698.08

On 1099B 

1d Proceeds = $936.81

1e Cost bases = $2634.89

Loss = -1698.08

When I enter these values, my tax burden only goes down by $590

I was of the notion that the full loss under $3000 can be deducted from taxes. Can some please explain why I am getting this result?