Taxation in the US: Internal Revenue Service (IRS) tax forms (Part One)

Internal Revenue Service (IRS) tax forms are forms used for taxpayers and tax-exempt organizations to report financial information to the Internal Revenue Service of the United States. They are used to report income, calculate taxes to be paid to the federal government, and disclose other information as required by the Internal Revenue Code (IRC). There are over 800 various forms and schedules. Other tax forms in the United States are filed with state and local governments.

Individual forms.

1040.

As of the 2018 tax year, Form 1040, U.S. Individual Income Tax Return, is the only form used for personal (individual) federal income tax returns filed with the IRS. In prior years, it had been one of three forms (1040 , 1040A  and 1040EZ - see below for explanations of each) used for such returns. The first Form 1040 was published for use for the tax years 1913, 1914, and 1915. For 1916, Form 1040 was converted to an annual form (for example, updated each year with the new tax year printed on the form). Initially, the IRS mailed tax booklets (Form 1040, instructions, and most common attachments) to all households. As alternative delivery methods (CPA/Attorneys, internet forms) increased in popularity, the IRS sent fewer packets via mail. In 2009 this practice was discontinued.

Income tax returns for individual calendar year taxpayers are due by April 15 of the next year, except when April 15 falls on a Saturday, Sunday, or a legal holiday. In those circumstances, the returns are due on the next business day. An automatic extension until Oct. 15 to file Form 1040 can be obtained by filing Form 4868.

Form 1040 is two abbreviated pages, not including attachments. Prior to the 2018 tax year, it had been two full pages, again not counting attachments, but following the passage of the Tax Cuts and Jobs Act of 2017, the IRS dramatically shortened both pages. The current first page collects information about the taxpayer(s) and any dependents, and includes the signature line. The current second page includes information on income items and adjustments to income, and additionally calculates the allowable deductions and credits, tax due given the income figure, and applies funds already withheld from wages or estimated payments made towards the tax liability. Prior to 2018, information on income items and adjustments to income had been entered on the first page. The Presidential election campaign fund checkoff, which allows taxpayers to designate that the federal government give $3 of the tax it receives to the Presidential election campaign fund, is near the top of the first page on both pre- and post-2018 versions of Form 1040.

Form 1040 has 20 attachments (up from 14 before 2018), called "schedules", which may need to be filed depending on the taxpayer: