To try a 1040 return, first make sure you check the step-by-step instructions below.
Then go to http://www.taxsoftware.com/product.htm
Click on the ACCEPT button, and then click on the NEW button and
enter 501-01-5001 in the format XXX-XX-XXXX on the Taxpayer ID field, and
on the Taxpayer name field.
Then select 1040 and tax year 2012.
Click on the Next button and enter any information you want.
You can edit and print the tax return as many times as you want when you finish. Just make sure you don't change the selections above.