Form 1040 is the tax document that the Government makes available to taxpayers in the United States to file the annual personal income tax return. You have until April 18 to submit the form and until April 19 if you live in Maine or Massachusetts.

Do I have to fill it out?

You need to file IRS Form 1040 if you are (considered for Tax Purposes) a US resident earning money as an
individual and want to file your tax returns with the IRS.

Do you know its annexes?

Which 1040 Schedules you can use (or not use) depends on your tax situation.

The most common are:

• Schedule 1: for all additional income, such as unemployment compensation, money received for prizes,
  rewards or winnings from games and bets.
• Schedule 2: If you owe other-taxes, you must report them, such as self-employment tax, domestic
  employee employment tax, additional tax on IRA plans or other qualified retirement plans and accounts
  with benefits tributaries.
• Schedule 3: Declare payments and additional credits such as the credit for foreign taxes, credit for studies
  and the general credit for businesses.

The varieties that you will find from the 1040 form are the following:

• Form 1040(SP): Since 2020, and as an achievement for the Latino community, we have the 1040 form in
  Spanish, which makes the process much easier for Spanish speakers, as highlighted by an IRS press release.
• Form 1040-SR: Another new version of the 1040 form aimed at seniors, with a larger font size and
  variations in the deductions section.
• Form 1040-ES: It is the format in which self-employed workers, independent contractors or so-called
  Freelancers file their estimated quarterly tax return.
• Form 1040-NR: For non-resident aliens, that is, those who do not meet the requirements for a Green Card
  or proof of substantial presence and are engaged in trade or business in the US.
• Form 1040-V: Acts as a physical proof of payment of the amount of taxes owed (when you decide to pay
  by non-electronic means).
• Form 1040-X: To file any amendment to the tax return.
  Forms 1040-EZ and
• 1040-A: These forms have been repealed since December 2017 and are no longer
  used.