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Register for the online portal of the Federal Central Tax Office (BZSt)


If you wish to submit applications and returns electronically via the online portal of the Federal Central Tax Office, you must register in advance to use it.

The online portal (BOP) of the Federal Central Tax Office (BZSt) enables you to submit a wide range of tax data in a national and international context completely paperless.

You can use the online portal as a private individual, but it is also aimed at companies, tax consultancies, certain administrations and banks or insurance companies.

To ensure that your data records reach the BZSt confidentially and securely - known as authenticated transmission - you must register once on the BOP. If you want to send a large amount of data, you must also take part in the ELMA5 procedure for bulk data from the BZSt. You will need to register separately for this. However, registration on the BOP is a prerequisite.

Similar to the ELSTER software certificate in the ELSTER online portal of the tax administration, you will receive a so-called BOP certificate when you register in the BZSt online portal. This electronic certificate guarantees a secure procedure.

If you already have a valid ELSTER certificate, you do not need to register for BOP and can log in with this and the corresponding password.

As a rule, the certificate file or software certificate is the best choice for you as a user. Other login options include a security stick or a signature card.

The BOP certificate is valid for 2 years. You will usually receive an e-mail notification when the certificate expires. If you then log in again with your data, the certificate is automatically renewed. If you do not log in directly and the registration has expired, you can re-register using the known BZSt number and the secret.

Requirements

1st alternative: You have an ELSTER certificate file
2nd alternative: To register with the BOP, you must apply for an individual BZSt number and a secret value in advance

What documents do I need?

  • As a rule, no additional documents are required.