Go to the IRS form ordering page (See Resources).
Enter a partial or full form number into the search box, then click the "Search" button.
A list of all related forms will be returned. If you entered "1040" into the search box for example, the results list will show all related versions and schedules you may need.
Put a check mark in the box next to each form you'd like to order, then click the "Add To Cart" button at the bottom of the screen.
Follow the prompts to enter your name and mailing address to complete the order.