How do I file with the 1040 postcard?

E-filers can still use online software to file Form 1040 taxes, even though the paper form has changed. It’s unlikely that taxpayers will notice any major changes to the e-filing process. Filers will simply review their Form 1040, applicable forms, schedules, and worksheets before sending the tax return to the IRS.

But paper filers will have a much different experience from previous years. This is because the IRS and Treasury Department changed the basic Form 1040 from a few pages to a “building blocks” system, including a primary form and six new schedules to be completed and attached as needed.

E-filing is still the easiest way to file your taxes with the least likelihood of calculation errors, the most straightforward process, and the greatest amount of security.