Online instructions for Form 1040 can be found at IRS.gov, the official website of the Internal Revenue Service. The IRS makes a complete catalog of all forms and publications for the current tax year available on the site and provides access to information from previous years.
Instructions are available for all versions of Form 1040 in both English and Spanish. The instructions can be read online or downloaded for printing or reading offline. Taxpayers interested in finding the instructions can find them in the extensive catalog listing or can search the site for them. In addition to the official publications, the IRS also has other resources available on the site to assist taxpayers.