Five things you need to know today, and a hot talk on housing

Good morning, Boston. You made it to Friday. Here are today’s five things you need to know in Boston business news to start your day.  A primary-care startup focused on holistic healthcare for older adults has opened its first practice in Quincy after raising a $15 million Series A venture capital funding round, Cassie McGrath reports.Surprise tax bills are hitting many small businesses around the country, with businesses in the software industry feeling pain from huge, unexpecte