Sch D, basis reported. I have sales with basis reported, so the totals are on Lines 1a and 8a. How do I get ProConnect to attach a summary of the details of the totals?

See this article for detailed instructions for making Sch D input.  Based on the option you choose for Basis Rptd, ProConnect Tax will flow your entries to either Sch D or F.8949: https://proconnect.intuit.com/community/form-8949/help/entering-stock-transactions-for-form-8949-or-schedule-d/00/5238

You may like to refer to the IRS' instructions for when attachment is necessary: https://www.irs.gov/instructions/i8949#idm140393400115600

Here's an article about how to attach documents to a tax return for e-filing: https://proconnect.intuit.com/community/electronic-filing/help/how-to-attach-a-pdf-to-form-1040-for-e-file/00/5263

The "answer" did not solve my problem.  I have CGs (w/ basis reported) from several brokers that are reported on 1a and 8a.  I enter each broker or account totals, only, on the quick access section of the input.  I would like for ProConnect to add a schedule to my tax return that summarizes the details that make up 1a and 8a since those totals come from 5 or 6 different 1099s. I don't want the details on an 8949 since it's not required in this case.  Just want a paper trail.  I  realize I can prepare that summary on excel and attach it, but I prefer to "trigger" something that causes the software to do it.  But, many thanks for your response!