J.K. Lasser's Your Income Tax ($14.95, MacMillan) is a broad-based tax guide that includes a listing of special tax situations for self-employed persons, with checklists of professional deductions and self-employed tax liability. To order, call (800) 223-2336.
Net Taxes ($12.95, Michael Wolff & Co.) is a guide to using the Internet, online services and tax software to "make tax time less risky, less costly and less burdensome." It includes advice on accessing state and federal tax forms electronically. To order, call (800) 793-BOOK.
The IRS offers free advice on tax questions, and will send you the forms for filing small-business taxes, through their toll-free phone service at (800) 829-1040.