After arrival in Berlin

Registration, tax ID, bank, health insurance, the immigration office.

1. Register your address (Anmeldung): within two weeks after moving into a flat (§ 17 (1) BMG; text), at a Berlin Bürgeramt. Bring passport and the landlord's confirmation of move-in (Wohnungsgeberbestätigung). Appointment waiting times and the list of documents: see service.berlin.de.
2. Tax ID: the federal tax office sends it after registration. Usual delay not verified. See Taxes.
3. Immigration office: apply for your permit within 90 days after entry (Entry). You need your registration certificate for the appointment. Do not wait for the Anmeldung if the 90 days end soon: ask the LEA what to do if you have no flat yet.
4. Health insurance: mandatory.
5. Bank account: needed for salary and rent. US-person status may complicate it, see Taxes.
6. Work contract and social security number: from your employer after you start.
7. Driving: Licence. Documents: Apostille.