It depends on where you're based: not only do different countries have different paperwork, but so do different states, counties and even cities. There are some places where you can start a new business without filling out any paperwork (although you'll likely have to deal with tax forms and the like after you've been in business for a while.There are some common forms that you should check on whether you need for your area:Business licenseProfessional license u2023 In addition to a license for operating a business, certain professions are licensed.DBA / Doing business as u2023 If you're doing business under a name other than your own, such as a company name, you may need to file a DBA.Incorporation or organizational documents u2023 Depending on how you organize your business, you may need to file paperwork to incorporate.Tax registration u2023 You will usually need to register with your local state if you're collecting sales tax. You will also probably need to complete paperwork to get a taxpayer identification number or an equivalent for your business.Employee forms u2023 If you have employees, there can be quite a bit of paperwork, including their tax paperwork and any appropriate registration.These really are just a starting point. One of the best things you can do is find a local accountant or other professional to advise you on what you need.