The Internal Revenue Service makes changes to tax forms and releases updated versions every year. The forms for the current year, as well as forms from prior years, are available for downloading and printing from the official website of the IRS.
Each year the IRS makes changes to the tax tables and other tax provisions to adjust for the effects of inflation. These changes, which make the previous versions of the forms obsolete, require the IRS to release updated versions of the forms each year. The archive of older forms is maintained by the IRS for taxpayers who need to file amended returns for previous years.