A copy of last year's tax return
Personal identification [driver's license, social security card] for you and your spouse, if applicable, showing the social security numbers
The social security cards of your dependents, if applicable
W-2s from all of your employers
Forms 1099 showing dividends and interest paid to you throughout the year from each bank, brokerage firm, investment company and mutual fund in which you invested in 2004
Form 1099-G showing any refund, credit or offset of state and local taxes
All receipts pertaining to your small business
Forms 1099-DIV, 1099-R
Income receipts from rental real estate, royalties, partnerships, corporations, trusts
Unemployment compensation
Social security benefits
Other income
Medical and dental expenses
Receipts from taxes you paid such as state and local taxes, real estate taxes, personal property taxes
Form 1098 for home mortgage interest and points
Receipts for charitable contributions and gifts
Casualty and theft losses
Job expenses
For more information: go to http://www.irs.gov