A 1040 booklet is an Internal Revenue Service publication that contains instructions on how to file taxes, as stated on the Internal Revenue website. The booklet can be very helpful, especially for first-time filers.
The IRS updates the 1040 booklet each year to keep up with tax changes that may occur, advises the IRS. Contained in the booklet are instructions for topics such as filing requirements, filling out the tax form 1040, submitting payments, obtaining refunds, and filing dependents. The booklet also instructs taxpayers on how to file taxes electronically if they wish to do so, a process known as e-filing.