Here is the third book you need by your bedside ... the IRS pub 3. Read the rules starting on page 17 and follow the program screen instructions carefully to get the personal residence exclusion if you are eligible. If you are having trouble then upgrade to the LIVE option or seek local professional assistance for this year's return ... see if the JAG office has tax prep help.
https://www.irs.gov/pub/irs-pdf/p3.pdf
