There is a particular kind of relief that comes with filing a tax return, especially an extended one. The deadlines are behind you, the number is settled, and for a moment, the temptation is simply to exhale and move on. It is a reasonable instinct. It is also, quietly, the most expensive habit in business ownership. A completed return is not the end of a story. It is a useful starting point for planning, a year of reported income, deductions and other tax information in one place.
