If you've been doing it all along like you're supposed to, without software help, nothing much has changed.  Just have to show your work and file it with the return now. 

What's New
Form 7203 and its separate
instructions are developed to replace
the 3-part Worksheet for Figuring a
Shareholder’s Stock and Debt Basis
and its related instructions formerly
found in the Shareholder's
Instructions for Schedule K-1 (Form
1120-S).