A client bought a townhome in 4/2013 and lived there until December 2016.  In 2017 his brother lived in the house and paid the mortgage. Last year preparer reported it as a rental.  The townhome sold in May of 2018.  So the owner used it as his personal residence for two of the last 5 years but not for 17 months.  How do I report an exclusion for the part of the time it was used as a personal residence in 2018?