Thanks @Anonymous_ . I agree, the PTP should provide guidance, although much of what they do provide often seems to be "cut and paste" from IRS documents. And their K-1 preparers usually decline to offer much help over the phone (at their 800 number), for fear of giving out "tax advice" in some inappropriate way.
I think the real issue here is that the IRS appears to have an unspoken assumption that anyone dealing with this issue will have a professional accountant handling their taxes. Which probably isn't a bad assumption, but it does leave out a good number of individual investors in PTPs, who do handle their own taxes.
