I was so exited about Stripe atlas. But for me it came around 2 months late. I already used a online website to register a C-Corp and they have no process to

I was so exited about Stripe atlas. But for me it came around 2 months late. I already used a online website to register a C-Corp and they have no process to "import" your c-corp you either start all over again or dont use it. I also have no idea what would I have to do to "close" the existing c-corp and start anew using atlas.