Tax Booklets and Tax Filing Help
If you need just a quick reference to some tax laws and not a full tax filing help, then you can pick up an IRS booklet that tells you how to prepare and file your tax return.
It is good to have the IRS publication 17 because it details just about anything you need to file your tax return. It will not go into detail on certain items but then you can look up other IRS publications and get your answers that way.
It is handy that the IRS makes available a ton of IRS publications for anyone to order for free of charge.