Before you can register a business you need to decide which form of incorporation to choose for your enterprise.
You have to decide whether to engage an accountant and/or auditor. There is no formal requirement to have
an accountant, but in some cases it is a required that the enterprise has an auditor.
You should familiarise yourself with regulations regarding tax and duties, accounting and auditing obligations and other requirements for your type of business. If you get it right initially and establish good procedures, you'll save much work later on.
Are you entering into the international market, it is also important to familiarise yourselves with the regulations that exist in the countries you want to interact with. On the information portal Your Europe, which is a portal developed by the EU, you will find the rules and regulations that apply when doing business in an EU country.