A lesser-known change in GOP tax proposals could result in big bill for Colorado home sellers

"Right now, owners must have lived in a home for at least two years within the last five years at the time of sale to avoid paying capital gains taxes on any increase in value up to $500,000 for joint filers, and $250,000 for single filers. 
But Congress, looking for ways to generate more revenues to pay for cuts elsewhere, wants to extend that to five years within the last eight years."