You must apply for tax relief in writing: If you had paid tax on the goods yourself, apply for remission or refund of the tax as part of your monthly tax return. In it, fill out the relief declaration and the attachments listed there. If you include goods in your tax warehouse that someone else had paid tax on, you can apply for a refund using the form "Confirmation of taxation". Complete the relevant form and, if necessary, the attachments in full and send them by post to your main customs office. The main customs office will check the relief. You will receive a notification with the result of your application. The main customs office responsible is the one from whose district you operate your business or, if you do not operate a business, the one in whose district you are resident. If your business is operated from a location outside Germany or if you do not have a place of residence in Germany, the main customs office in whose district you first appear for tax purposes is locally responsible.