Last year, my two siblings & I inherited my moms house. We sold it & divided the sale 3 ways. My mom had paid $200,000 for the house with an outstanding mortgage of $71,000. We sold it for $142,000. When it was all said & done we each received $20,000. A friend recently told me I have to report that "income" on my tax return this year. I did not receive any thing in the mail about it. What should I do?