How does free sound?  And it’s from a VERY authoritative source – the IRS.  You can order up to five copies free (they even pay the shipping and handling) of a great training package.  Here the IRS description:  “A Virtual Small Business Tax Workshop DVD is an innovative DVD designed to help new and existing small business owners understand and meet their federal tax obligations. The workshop provides information and resources in an interactive format. The workshop consists of ten lessons and is subtitled in English, Spanish and Mandarin Chinese. The DVD running time is 3 hours and 43 minutes. This DVD replaces two CD-ROMs: Publication 3700, A Virtual Small Business Tax Workshop and Publication 3693, Introduction to Federal Taxes for Small Business and Self-Employed. The DVD will run on a commercial DVD player or on a personal computer (including Macintosh OS X).”

You can get this at: http://www.irs.gov/businesses/small/article/0,,id=101169,00.html .

Of course this only covers the basics.  If you get very complicated transactions you will want to consult with a tax professional.