In order to find a form you will need to get to the page where you fill out your taxes, (on the left you will see the "Federal Taxes", "State Taxes" options etc.)
On this page, on the left hand side, towards the bottom of the page, you should see an option that says "Tools", if you click on that, in the pop up box there will be an option that says "Topic Search", there you will be able to search for any form by name and click "Go" and it will take you to the page where the information for this form is.
