The Form 1040 is the master income tax form.
All other documents, schedules, and worksheets ultimately flow into the Form 1040.
For a schematic description of what is really going on in the 1040, see here.
New York help topics
Pub 4012 Basic Essentials
Intermediate & Advanced Topics
Any opinions, commentary or annotations on this site represent the personal opinion of the site's author and not the IRS. Any hypothetical tax scenarios discussed on this site are illustrative discussions for the purpose of preliminary volunteer training, and not tax advice. The tax code is so complex that a completely accurate answer about your particular situation requires a complete consultation with a comprehensive intake interview and quality review process. If your tax situation falls within the scope of our site's IRS VITA certification, you are welcome to make an appointment for FREE comprehensive tax help at our VITA site after we open in the third week of January, where we will conduct a full interview and intake and quality review process to take into account all relevant circumstances of your particular tax situation..
Schematic Tour of the Form 1040