Ok, so if you were able to follow my rambling for "Do you know Edgar?" https://voat.co/v/pizzagate/1474981 You are in for another treat.
This time I will be giving a short tutorial on how to track 501(c)(3) organizations (also known as Soros Mules (only in my head))
There is no one way to going about getting the EIN in the first place.
Generally https://apps.irs.gov/app/eos/ is a good place to start. It is a search tool that finds most organizations
(I haven't played with it enough to tell you if it finds all - although I'm not finding "feminist martial arts" in there (maybe have the wrong name?) even if I do find "feminist karate union")
You can generally also go to state web pages like http://rct.doj.ca.gov/Verification/Web/Search.aspx?facility=Y or search for state non profit registration. Generally they have a search function (I think Utah was a pain and didn't give them out for free).
Once you've located the EIN you can get their previous three 990 forms from foundation center
http://foundationcenter.org/find-funding/990-finder
EIN 46-3408143 is for feminist frequency and I will be using it for further examples
Guild Star will also have reports and you can look them up by putting the EIN at the end of this http://www.guidestar.org/profile/
example http://www.guidestar.org/profile/46-3408143
or by looking on their web page (some actually post there in effort to e-beg)
If you don't which organizations to begin looking into I'd suggest looking at http://www.opensecrets.org/ and playing around with their search engine.