Our employees only speak German in the office and on the phone.

Federal Central Tax Office, Division Q 5 – Co-ordinating Unit for Electronic Applications (koSt ELAN) Bundeszentralamt für Steuern Referat Q 5 – koordinierende Stelle elektronische Antragstellung (koSt ELAN)

+49 228 4061200
An der Küppe 1, 53225 Bonn

Superordinate agency
- Federal Central Tax Office (BZSt)

Our services

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.
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 The official information in German is complete and correct.

Updated on 11.09.2026

Federal Central Tax Office, Division Q 5 – Co-ordinating Unit for Electronic Applications (koSt ELAN) Bundeszentralamt für Steuern Referat Q 5 – koordinierende Stelle elektronische Antragstellung (koSt ELAN)

Our services

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