The Washington Department of Revenue Tax Compliance Certification is a legal certification that businesses must obtain before operating in the state of Washington. This certification is designed to ensure that all businesses operating in the state are compliant with the relevant tax laws and regulations. It also helps to protect the state's tax revenue. The Washington Department of Revenue Tax Compliance Certification is divided into two types: the Annual Tax Compliance Certification and the Initial Tax Compliance Certification. The Annual Tax Compliance Certification is intended for businesses that have been operating in Washington for at least one year. It is renewed annually, and requires businesses to provide information about their taxes and activities to the Department of Revenue. The Initial Tax Compliance Certification is intended for businesses that are new to operating in Washington. It requires businesses to provide information about their taxes and activities to the Department of Revenue before they can start operating in the state. Once a business has obtained the Washington Department of Revenue Tax Compliance Certification, it is required to provide the Department of Revenue with regular updates on its taxes and activities. This helps to ensure that the business remains compliant with the state's tax laws and regulations.