Forms are THE MOST important element of tax law to maintain and have knowledge of from a practice perspective. While all research information bows to the requirements of the IRS in terms of income tax collection, knowing what forms you need for what situations--and how to draft them--is of paramount importance. Below are the ways you can source examples and examine your own drafts of tax documents.
Westlaw's Tax Form Finder includes state searches and searches by publication for finding tax forms. Within each state it is very simple to search for a desired form with a form number, search term, and utilization of Boolean terms to obtain accurate, user-appreciated forms. Westlaw's Drafting Assistant tool is a helpful invention to make sure your documents and forms are correctly composed and written as best as they could be. While the help menu is a bit cumbersome, it is a great tool for the drafter in need.
LexisNexis has a more simple tax law forms selection process, including checklists and annotated examples of forms. While not as specific as Westlaw, it is a very efficient and fast search process that does not bog down a user with more menus than may be necessary for certain introductory documents. The brief analysis tool is for more than just briefs, though it does have a primary focus on briefs. However, in terms of comparing materials, it is a pretty straightforward tool that--though lesser than Westlaw's and Bloomberg's--allows users to compare their work to previous examples to ensure correct construction and information.
Bloomberg has contract drafting and draft analyzer tools, both used for varying purposes and efficient in their own right. The contract drafting section shows many example clauses, agreements, guides, and market-based constructions, taking the place of a sort of form section. This is less inclusive than LexisNexis and Westlaw's forms sections, but is more specific for particular search needs. As well, the analyzer tool is very helpful in making standard documents and forms, being the most approachable and user-friendly product of its type.
If you know what forms you need, nothing will beat the IRS's Forms, Instructions, and Publications collection. Straight from the horse's mouth, this database provides any form necessary for filing income tax in a surprisingly user-friendly system.
For Georgia residents, the state's Department of Revenue individual income tax form page provides taxpayers and researchers with the needed materials for submitting a year's taxes with update information and forms.