If you use your full personal name for the business, no registration is required. Box 7845, Madison, WI 53703. Registering is not required but it puts your name on file. It does not incorporate a business nor does it provide employer identification numbers, state or federal. It does not put your business on file with the Department of Revenue.
All personal assets are subject to satisfying business debts.
Personal income and business income are taxed as one entity. B. Partnership - A partnership is a relationship between two or more persons who join together to carry on a trade or business. Each person contributes money, property, labor, or skills, and each shares in the profits and losses of the business. Any number of persons may join in a partnership. All owners are personally liable for total business debt, even if they did not take the action causing the debt.