If I understand right Paycent is based on Texcent, that is active on the market for several years already => https://paycent.com/contact/. I don't know exactly is Paycent=Taxcent or it's a subdivision, but the main thing they were working for some time already and they should have some financial reporting.
It would be more clear if this "powered by" would be translated into legal relationship betweet these entities. And I'd like to have answer for the initial question about financial reporting in order to be able to make prognosis of the future revenue share that is promised to investors.
Paycent is a development by Texcent Asia Pte Ltd.