The IRS Web site has many helpful tax tips to guide you through your 2005 filing. If you didn't receive your IRS tax package in the mail, you can go to IRS.gov to download any federal tax forms you need. You'll need to print out the forms, which can be a lengthy process. One trick is to just print out the actual forms and not the endless ream of pages that include instructions for how to complete the form. If you save the download to your hard drive, you can open the document as often as you need and refer to the instructions on your computer screen. You can also order hardcopy federal tax forms to be delivered to you by mail at IRS.gov.