The detailed document -- a compendium of information on a variety of tax topics -- offers tax tips that do-it-yourself tax preparers may find valuable. For example:

• In itemizing your deductions for medical and dental expenses, you may include transportation expenses incurred for necessary care, and you may generally include payments for qualified long-term care contracts.
  
• You may deduct a proportion of casualty losses, such as those that result from a flood, storm, or auto accident. You may also deduct losses due to theft.
  
• If you work, you may qualify for earned income credit.
  
• If you have an elderly dependent who spends eight hours or more a day in your home, the amount you spend on non-institutional "daycare" may qualify as credit for dependent care expenses.

Tax filing errors also cost you money. Among the top 10 tax filing errors are these:

1. overpaying Social Security taxes
2. unnecessarily declaring state tax refunds as income
3. making math miscalculations
4. not keeping sufficient documentation that you filed your income tax return on time (to avoid penalties).