Jeff and Donna Walsh called it quits after long careers in 2017, downsizing to a smaller, mortgage-free home in the process. The 64-year-old couple — their names have been changed for this article -– sold the spacious New Jersey home they’d owned for 20 years and relocated to a condo in Florida. Now they face fresh twists this tax-filing season — and a whole new set of tax challenges in the coming years.