since you have not lived in and owed the first home purchased for at least 2 years, any gain will be taxable unless you qualify for a partial exemption by meeting one of the three exceptions
1) change in place of employment
2) health
3) to the extent provided in regulations, unforeseen circumstances.
if you want more info about any of the exceptions post back in this thread.
also see IRS pub 523
https://www.irs.gov/pub/irs-pdf/p523.pdf
