I am learning the ProSeries Basic software, evaluating it for Tax Prep.

I agree.  The Schedule D entry interface is horrible and needs an Excel upload feature to import all stock trades.  There could be 000's of entries. 

Yes summarizing them and then attaching the excel spreadsheet is an option (not sure how to attach an excel spreadsheet to show all the detail) but that doesn't print out with the return.  It is up to the tax payer to then keep the excel file in case of audit.