When starting a business in the United States, it is important to obtain an Employer Identification Number (EIN) from the Internal Revenue Service (IRS). An EIN is a unique nine-digit number that identifies your business for tax purposes.

To apply for an EIN, you can complete an online application on the IRS website or submit Form SS-4 by mail or fax. The application will require you to provide information about your business, such as the legal name, type of entity, and business address.

In addition to obtaining an EIN, you may also need to register for state and local tax accounts, depending on the location and type of your business. State and local tax requirements may vary, but some common types of taxes include sales tax, income tax, and property tax.

To register for state and local tax accounts, you can typically visit the website of your state's Department of Revenue or Taxation and follow the registration process outlined on the site. You will need to provide information about your business, such as the legal name, EIN, and business address.

Once you have obtained an EIN and registered for state and local tax accounts, you will need to ensure that you are complying with all tax laws and regulations. This may involve collecting and remitting sales tax, paying income tax, and filing periodic tax returns.

It is important to consult with a qualified accountant or tax professional when starting a business to ensure that you are meeting all tax requirements and obligations. They can help you navigate the complex tax laws and regulations and provide guidance on tax planning and compliance.