Investopedia / Mira Norian Individual taxpayers use Form 1040, a standard Internal Revenue Service (IRS) form, to file their annual income tax returns ... the IRS website. Free IRS filing ...

Or you can use the IRS's Free File Fillable Forms. Often the simplest way to fill out Form 1040 is to use tax software, which is free for most people but may require a fee if you have a ...

If your original tax return included a refund, you should wait until you get it before filing Form 1040-X. The IRS will issue a separate, second refund if it is warranted, so feel free to cash the ...