The business actor must obtain a permit in the form of an agreement that is stated in the form of a letter/decision or fulfillment of the requirements and/or commitment to start and run a business and/or activity. With this agreement, the business actor is given a Business Registration Number (NIB), namely the identity of the Business Actor issued by the OSS Institution after the Business Entity registers through Online Single Submission (OSS). The Business Actor must enter the business data when establishment the company to be able to access the OSS in the AHU Director General of the Ministry of Law and Human Rights, in accordance with the Indonesian Standard Industrial Classification (KBLI). The method used is normative research methods, by reviewing several documents, applicable regulations, and company establishment documents. The conclusions of the problems are as follows: 1. Enforcement of integrated business licensing services through on line or OSS has an effect, that each company establishment must enter company data specifically in the business field of the AHU Director General of the Ministry of Law and Human Rights, through a process of ratification or registration, namely for business entities in the form of legal entity is using ratification, while a business entity that is not a legal entity is using registration. 2. Business actors in determining business fields for business activities carried out in the business establishment process must adjust to the Indonesian Standard Industrial Classification (KBLI) as stipulated in the Regulation of the Head of the Central Statistics Agency. 3. For companies that have been established before