IRS tax forms are easier than ever to get your hands on these days. The IRS will mail packages, including a range of tax forms, to nearly 18 million people this year. If you don't get one in the mail by the end of January, check your local post office or office supply store. Many of them stock the most common free tax forms. If you're Internet savvy, you can also go to IRS.gov to download tax forms for any need.