Bob I think the 7203 will eventually be required to be filled by the s Corp in the future so the IRS can program their computers and correlate the form to the shareholders. It may take them some time but I think it will happen. 

it actually does help to calculate basis very neatly. I have my own form from 30 years ago that I obtained from a seminar that I use sometimes to check the computer and also on excel. Basis and AAA. As they can be different.