You can learn to prepare basic corporation and partnership returns by taking our Small Business-I course (link below). More advanced topics are covered in our Small Business-II course (2nd link below). These two courses are available as a bundle at a discount (3rd link below).
http://shop.theincometaxschool.com/shopexd.asp?id=7
http://shop.theincometaxschool.com/shopexd.asp?id=8
http://shop.theincometaxschool.com/shopexd.asp?id=157
