You probably owe 100% of the tax.
There is a provision that if the "primary reason" for the sale was because of a job change you could qualify for a partial exclusion. However, because you HAD already met the 2 year period, the job change isn't really why you didn't meet the two year rule. The fact that your rented it for 2+ years indicates that the job change was not the "primary reason" for the sale.
