My business activity is only part-time and relatively small, do I need to do the bookkeeping aswell? Isn't it enough to make only a Business Tax Return? Asiakaspalvelu January 22, 2019 14:10 Updated Follow Yes, bookkeeping is mandatory for all businesses, regardless of size. Through us, it can be easily done without an accountant. Try for free! Related articles How to pay prepayment taxes? Comments 0 comments Article is closed for comments.