The K7s I've seen is for ROBS or similar, where it was a distribution or rollover for some self-directed self-investment, and the basis or FMV is marked as can't be determined, because the asset isn't funds. For example, forming an LLC and forming a retirement plan, then rolling your other account holdings here, then using the funds to hold property and investing your retirement account in the property, and operating the rental, then deciding to move into your property and think you are contributing to your own retirement account tax free or tax sheltered. Some weird thing like this that is sold as a great idea.