As a general rule, all companies must register with the Danish Commerce and Companies Agency. This is optional, however, if your annual earnings are less than DKK 50,000. Once the company has been registered, you will receive a CBR-number (Central Business Register), which is the company's identification number. You will need your CBR-number, for example, when it comes to completing your tax and VAT declaration. You can register your company by logging onto "www.eogs.dk"