Data modification

Hello.

Could I ask you for help?

I operate a contributor account as an individual, there have already been sales, but I have not yet requested a payment (I could). However, due to changes in the law, I now have to start a business and bring this activity of mine into the business.

My question is, how can this be solved? Is it enough if I change the data and upload a new tax declaration? Or is it more complicated than that? Do I need to ask customer service for help with the modification?

My other question is, as long as there was no payment for it, is it easier to transcribe it? (That's why I waited until now to request payment.) Or can I request payment now and can the data be easily changed afterwards?

Thank you very much for the answers!