Until you distribute the profits, there is no tax.
If you decided to pay out a salary, you will incur an income tax (20%) and a social tax (33%)
If you want to pay out dividends, the tax on them is 20% on gross profits.
If your company's income/turnover for the calendar year is more than €40,000 for transactions with the EU or Estonia, you will have the obligation to obtain an Estonian VAT number. In this case, you will have a rate of 20% or 0% applied, depending on who your client is.