Please fill in all information that is applicable to your situation. The only required fields are the fields for Taxpayer 1 at the top. You only need to fill in Taxpayer 2 information if you were legally married at the end of the year. And only include dependents if you had someone live with you more than 6 months or if you will be claiming the child due to a divorce agreement. We will also need social security numbers and birthdays to file the tax return, but we will call to get that information to protect your information on the internet.