Washington "corporation", "incorporated", "company", or "limited", or the abbreviation "corp.", "inc.", "co.", or "ltd."; must not include "Bank", "banking", "banker", "trust", "cooperative", or any combination of the words "industrial" and "loan", or any combination of any two or more of the words "building", "savings", "loan", "home", "association", and "society" § 23B.04.010 Revised Code of Washington
Your name must be unique, and not deceptively similar, to any other trademarked name or business. It is also required that your name not be used to intentionally misrepresent the products or services you offer. For LLCs, nearly all states will also require you to add a signifier of your limited liability status, such as "LLC" or "L.L.C." to the end of your company's name. You may be able to operate under a name other than your formal LLC name by applying for and using a dba.
Limited liability companies can raise money via banks and investors but cannot sell stocks. S-Corps can get loans from banks, as well as distribute stock to up to 100 people. C-Corps have the easiest time raising capital as there is no cap on how many people can own stock. Non-Profits can both get loans and receive tax-deductible donations. Sole Proprietorships can occasionally receive bank loans but cannot sell stocks.
Minnesota nonprofit corporations are not required to use any of these words; for business corporations, they must use "corporation", "incorporated", or "limited", or shall contain an abbreviation of one or more of these words, or the word "company" or the abbreviation "Co." if that word or abbreviation is not immediately preceded by the word "and" or the character "&" Chapter 302A, Section 302A.115 Minnesota Statutes (for Business Corporations); Chapter 317A, Section 317A.115 Minnesota Statutes (for non-profit corporations)
While limited liability companies have less compliance requirements than other entity types, there are reports and licenses that need to be filed and maintained. S-Corps usually will need to file reports and pay compliance fees on an annual or semi-annual basis. C-Corps generally must file reports with their state, as well as a host of other regulatory and compliance fees. Non-Profits have more compliance responsibilities than other entities as they must continually preserve their tax-exempt status. Sole Proprietors do not have ongoing compliance fees.
If you received a Notice to File a Business Property Statement from the Assessor and your business is no longer in operation, you are still required to file the Business Property Statement. You should also include a note on the Business Property Statement indicating that the business has closed, so the Assessor does not continue to assess the property.