Deductions & credits

So my taxable income at the end of every year is around $25,000.  I sold the home for $500,000.  I owed $164,000 on that home.  I cleared around $308,000.  I immediately purchased another home for $273,000.   I lived in the 1st home for 5 years and was my primary residence.  I am a widow so I'd fall under the single status.