I have a (up to now) pretty standard taxpayer.

This year he notified me that he received a distribution from BSG (A UK private Equity firm). He provided the capital vs Income ratio as provided by them. 

How would I report this income? Would this just count as a dividend? 

I am familiar that if a taxpayer owns stock in a foreign mutual fund it potentially triggers 3520 filing in addition to the usually FBAR/8938 reporting. However looking around I have been seeing that they treat private equity firms differently. Does anyone have any experience this this?