At the NATIONAL level,
IRS and Social Security require registration and regular filings. this includes an Employer Identification Number (EIN) and IRS Form SS-4.
At the STATE level,
Articles of incoropation must be filed with the Secretary of State in order to create a Limited Liability Company (LLC) and a Minutes Book maintained. Registration is required for the Texas Controller's Office for tax purposes.
At the LOCAL level,
Licenses may be required by local municipalities, and a "Doing Business As" registration may need to be filed with the county(s) in which the business operates.