A sole-proprietorship is a business owned by one person or one company. There are no partners. The sole-proprietor has absolute say in the running of the business.
A partnership is a business firm formed by two to twenty partners. Once there are more than twenty partners, the partnership must be registered as a company under the Companies Act.
The first step is to choose a name for the business and then register the business. This can be done in two stages or all at one go.
There is now the option of purchasing a Special UEN (Unique Entity Number) for your Business (sole-proprietorship or partnership) where you choose the numbers. A UEN is your business' unique identification number that will be used in all interactions with government agencies.