"Ahora todo se ha determinado."
Translation:Now all has been determined.
The reflexive verb aclararse means to clarify.
Edit: strictly, aclararse is pronomial.
Thanks, I had done a quick search for aclararse but it didn't come up on a Spanish verb conjugator site that I use. Nevertheless, all the examples in usage that I am finding for aclararse are in a passive voice. I don't think your suggestion would be correct.
I think (emphasis on think) that because "se todo" is being used it tells us that "todo" is the subject of the sentence. So "all" is the subject by itself. I think (insert emphasis again) "Now it has all been determined." would be "Ahora lo ha determinado todo." Or something like it.