How do i register myself as a partnership business? -

Do you have a partner? If so you are in partnership as soon as you start trading together. There is no specific requirement to register a partnership, other than the need to tell HMRC that you are self-employed in order to ensure you are paying the correct NI contributions and are sent a self-assessment notice.However, it is strongly advisable that you and your partner(s) draw up a written partnership agreement that sets out the rules of your partnership. Otherwise you will be stuck with the statutory default rules which in many cases are inappropriate.