I need help with this question for my accounting 3486 Federal taxation course that uses the book Pearson's 2019 Federal Taxation for individuals.

Ike and Tina married and moved into their new home (purchase price $800,000) 18 months ago. They are thinking of selling the home which is now worth $1,300,000. They plan to reinvest in a smaller home costing approximately $600,000. What should they consider before selling their home?