I looked at it today and I think I got it all good with a bit of advice from someone.
1)3 types of commission classifications:
-Paid to Business V.A.T registered(or self employed). in EU but not my EU country
-Paid to Business V.A.T registered(or self employed). in my country(EU).
-Paid to non V.A.T registered people.
-When it is a business and it is established in the EU but outside my country(which is in EU too), the invoice will need to be Zero rated(reversed charge).
-When it is a person not vat registered in EU or outside EU, I will have to send a payment but they will have to send me some kind of receipt
-When it is local(in my country), they will have to add 18% v.a.t to the commission(exclusive and not inclusive) as I will then recover this from the rest of the sale.
I now understand the principle of self invoicing which in a way would sort out all of this. But if I am correct, no EU countries can self invoice without approval from the V.A.T department(I will have to check this one out).
In all case, I understood how to input it into Manager, in fact it is just as you said a “purchase”.