u have to? The IRS is not going to tell you about a deduction you failed to take, and your accountant is not likely to take the time to ask you about every deduction you're entitled to. It's up to you. The savings can be tremendous. This invaluable book not only lists the individual items that are deductible but also explains where to list them on your income tax form. The fourteenth edition is completely updated to include new changes in tax law.