If possible, you should make the tax registration of your company or your independent activity online. Make a tax registration online: Log in to the website "ELSTER your online tax office" of the German tax administration with your ELSTER user account. Note: If you do not yet have an ELSTER user account, you must first create it. Registration involves several steps and can take up to two weeks. You also need the ELSTER user account for the electronic transmission of your tax return. Then, under the "Forms & Services" tab, select "All Forms". Then click on the tax registration questionnaire relevant to your business or self-employment. Complete the online form in full and upload the required documents if necessary. Submit the questionnaire. The tax office checks your details and, if necessary, you will have to submit documents. You will then be informed of your tax number in writing. Note: There is currently no online procedure available for associations and corporations under foreign law. Make a tax declaration in writing: Download the respective questionnaire for tax collection on the website of the Federal Finance Administration. Complete the questionnaire in full. Use the questionnaire to check whether the tax office needs further documentation from you. Send the questionnaire and any documents to your tax office. The tax office checks your details and, if necessary, you will have to submit documents. You will then receive a notification about your tax registration.