The IRS is planning to focus its attention in 2017 on the "Rich." That means individuals and companies who are likeliest to hide money or under-report their tax burden. While the IRS launches fewer full-blown audits, the agency is sending out more “mass notices” addressing specific issues (especially large charitable contribution, large losses, mortgage interest deductions, and 529 college savings plans). So-called “hobby losses” are a frequent IRS target. To combat these audits, be prepared to produce extensive records and documentation to substantiate each and every loss and charitable donation.