This A to Z guide to hundreds of legitimate tax write-offs is like found money for businesses. Here are deductions you never heard about. Deductions your accountant forgot to ask you about. Deductions your software program got wrong. Deductions the IRS chose not to list on their tax forms. 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. Now in its 7th edition, 13th printing, this best selling guidebook is fully updated for the 2008 tax season.