> ## Documentation Index > Fetch the complete documentation index at: https://docs.arbitrageone.de/llms.txt > Use this file to discover all available pages before exploring further. # How do I create and manage shipping addresses? > Create, manage and connect shipping addresses (home or Prep Center) in ArbitrageOne. ## Short description Shipping addresses define **where** your purchases are sent — either to your home or directly to a Prep Center. ArbitrageOne uses the costs stored per address to calculate your margin and ROI correctly. ## What do you need shipping addresses for? * **Record Purchase**: When recording a purchase, you select where the goods are delivered. * **Calculation**: The shipping costs of the default address flow automatically into margin/ROI calculations. * **Prep Center connection**: If you link an address to your Prep Center (e.g. PrepBusiness), shipments can be announced there directly. ## Step-by-step guide ### Step 1: Open the shipping addresses page → Open directly in the app: [app.arbitrageone.de/shippingaddresses](https://app.arbitrageone.de/shippingaddresses) Navigate to **Settings → Shipping addresses**. You'll see a card overview of all addresses you've already set up, with name, creation date and shipping costs. ### Step 2: Add a new address Click the **+ Add** button on the placeholder card *Shipping address*. The **Add shipping address** modal opens. ### Step 3: Enter a name (required) Enter a meaningful name (e.g. "Home Berlin", "Prep Center Munich" or "2nd Office"). ### Step 4: Set shipping costs (optional) * **Cost per unit**: Flat shipping cost per item (e.g. €0.50 packaging + handling). * **Cost per kg**: Weight-based shipping cost. ArbitrageOne adds both together. These values are applied to every deal delivered to this address. ### Step 5: Set the role of the address Three toggles define the function of the address: * **This address is the default address.**: Automatically pre-selected for new purchases and calculations. Only **one** address can be default per account at a time — if you activate it on another, the previous default is reset automatically. * **This is my own warehouse**: Marks the address as your home/office. * **This is a Prep Center**: Marks the address as a Prep Center. **Own warehouse and Prep Center are mutually exclusive** — activating one automatically deactivates the other. ### Step 6: Connect Prep Center API (optional) If you activate **Prep Center**, an additional dropdown **Prep Center API** appears. Select your already configured PrepBusiness connection here — so that shipments to this address can be sent directly to your Prep Center. ### Step 7: Save Click **Save**. The address appears in the overview immediately. ## Edit or delete addresses ### Edit Click the **pencil icon** on the address card — the modal opens with the current values. ### Delete Click the **trash icon**. After confirmation the address is removed. Already recorded purchases keep their link to the deleted address (soft delete). ## Important notes * Per row in the Sourcing Sheet you can override shipping costs individually via **Prep Fee Override** — the default values of the address are just the starting point. * The **default address** is also set per Sourcing Sheet (see [How do I create a Sourcing Sheet?](../sourcing/sourcing-sheet-anlegen)) and can differ per sheet. * You can't change the Prep Center API connection after saving — the dropdown is locked. If needed: delete and re-create the address. ## Common issues **Issue:** "Own warehouse" and "Prep Center" can't be activated at the same time **Solution:** That's by design — an address can only be one of the two. For both roles, create two separate addresses. **Issue:** Shipping costs are not taken into account in the margin **Solution:** Check whether the deal is actually being shipped to this address. If a different address is set as default, its costs apply. **Issue:** Prep Center dropdown is empty **Solution:** You need to set up a PrepBusiness API connection first. Only then does it appear in the selection. **Issue:** The default address changes by itself after creating a new entry **Solution:** You enabled **Default address** on the new entry — that automatically unsets the previous one. Disable the toggle if you want to keep the previous default. ## Related articles * [How do I create a Sourcing Sheet?](../sourcing/sourcing-sheet-anlegen)