> ## Documentation Index
> Fetch the complete documentation index at: https://www.twicecommerce.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# How to add an item to an order

> Put another listing on an existing order at the dates the customer wants, and check the stock behind it.

> [card] [Open in TWICE Admin](https://admin.twicecommerce.com/orders)
>
> orders

Add an item when a customer wants one more thing on an order they already have. The new line takes the dates you pick and the list price for them, and the order total goes up by its price. [Order Lifecycle](https://www.twicecommerce.com/docs/concepts/orders/order-lifecycle.md#edit-rules-at-each-stage) explains what each stage of an order lets you change.

## Prerequisites

> [!WARNING]
>
> **Required permissions:** **Create and edit orders**. Owner, Admin, Manager and Member all hold it. See [Users & Roles](https://www.twicecommerce.com/docs/settings/users-roles.md).

> [!NOTE]
>
> **Have ready before you start:**
>
> * **The listing and the dates** the customer wants.
> * **An order that is not closed.** A closed order shows no **+ Add** until you reopen it. See [Reopen an order](https://www.twicecommerce.com/docs/guides/orders/reopen-an-order.md).

## The walkthrough

**1. Open the order**

Open **Orders** and find the order. Check the location selector in the top-left corner first if your account has more than one location, because the table lists only the orders of the location it shows. The order opens on its **Summary** tab.

![The Orders table on the All tab, with one order's row highlighted](https://mintcdn.com/twicecommerce/-nH_TufuRFrWKTUZ/images/guide-add-an-item-01.webp?fit=max\&auto=format\&n=-nH_TufuRFrWKTUZ\&q=85\&s=3f9b97cf70d5bae8e9eaf70fdeef9b1e)

**2. Open the Add panel**

Click **+ Add** in the top-right corner of the order. The **Add** panel opens on the right, on its **Listing** tab, with the listings offered at the order's location.

![An order's Summary tab, with the + Add button in the top-right corner highlighted](https://mintcdn.com/twicecommerce/-nH_TufuRFrWKTUZ/images/guide-add-an-item-02.webp?fit=max\&auto=format\&n=-nH_TufuRFrWKTUZ\&q=85\&s=1eb3cc05dd528090f01601b191e56274)

**3. Set the dates**

Check **Purchase dates** at the top left of the panel. **Start** and **End** begin at the dates of the bookings already on the order. Open each one to pick a new date, then a time. The list beside them counts what is free for these dates.

![The Add panel on the Listing tab, with the Purchase dates block and its Start and End fields highlighted](https://mintcdn.com/twicecommerce/-nH_TufuRFrWKTUZ/images/guide-add-an-item-03.webp?fit=max\&auto=format\&n=-nH_TufuRFrWKTUZ\&q=85\&s=ece80514818f77522e1bc4d5cd3cb031)

**4. Pick the listing**

Type the listing's name in **Search anything** above the list. Each row shows how many are free for your dates, for each way the listing is sold. Click the listing's row. The **Add Line Item** panel opens with the listing and your dates.

![The Add panel with the Search anything field and the listing's row, with its availability line, highlighted](https://mintcdn.com/twicecommerce/-nH_TufuRFrWKTUZ/images/guide-add-an-item-04.webp?fit=max\&auto=format\&n=-nH_TufuRFrWKTUZ\&q=85\&s=e087c63af85813a35ad1d002d7d8b700)

**5. Choose the purchase option**

Open **Purchase option** and choose the one the customer wants. It sets how long the booking runs and its price. A listing with a single option has it chosen already, and a sale has none to choose. Where the listing is sold more than one way, choose **Purchase Type** first.

![The Add Line Item panel with the Purchase option field and its open list of options highlighted](https://mintcdn.com/twicecommerce/-nH_TufuRFrWKTUZ/images/guide-add-an-item-05.webp?fit=max\&auto=format\&n=-nH_TufuRFrWKTUZ\&q=85\&s=96b97d9a683ec18eff293a01c7bc3136)

**6. Check the dates and the price**

Check **Start** and **End**, or **Sales date** on a sale. An option with a fixed length sets **End** for you. **Unit price** shows the list price for these dates. Type another price in it to charge something else.

![The Add Line Item panel with the Start and End fields and Unit price at the list price highlighted](https://mintcdn.com/twicecommerce/gAy6DOwWGKXblDg8/images/guide-add-an-item-06.webp?fit=max\&auto=format\&n=gAy6DOwWGKXblDg8\&q=85\&s=d2548bfcd5059f0e50fd4e86331c41e6)

**7. Add the line**

Click **Add** at the bottom of the panel. The panel closes, and the **Summary** tab lists the new line with its dates and price. The order total includes it.

![An order's Summary tab with the newly added line item highlighted under the customer](https://mintcdn.com/twicecommerce/gAy6DOwWGKXblDg8/images/guide-add-an-item-07.webp?fit=max\&auto=format\&n=gAy6DOwWGKXblDg8\&q=85\&s=3ab80ae612c8d73956f83d7f5022086c)

**8. Check the stock behind it**

Check the **Stock item** column beside the new line. It lists the units held for the line, each with a chip showing its state, such as **Pre-assigned**. To put a different unit behind the line, click the unit and follow [Swap a stock item](https://www.twicecommerce.com/docs/guides/orders/swap-a-stock-item.md).

![The new line's units in the Stock item column and one unit's Pre-assigned state chip highlighted](https://mintcdn.com/twicecommerce/gAy6DOwWGKXblDg8/images/guide-add-an-item-08.webp?fit=max\&auto=format\&n=gAy6DOwWGKXblDg8\&q=85\&s=a43d880383f232f0257bcb1390933ed1)

## How do I know it worked?

* The new line is listed on the **Summary** tab with the dates and price you chose.
* The order total includes the new line.
* A unit is listed beside the line under **Stock item**.

## Troubleshooting / common pitfalls

> [accordion] There is no + Add in the top-right corner
>
> The order is closed, and **This order is closed** shows at the top. Reopen it first, as [Reopen an order](https://www.twicecommerce.com/docs/guides/orders/reopen-an-order.md) shows. On an order that is not closed, your role hides the button. See [UI visibility](https://www.twicecommerce.com/docs/concepts/admin/visible-areas.md).

> [accordion] Add stays greyed out
>
> A date or the **Purchase option** is missing, or the dates are not free. The field says which, for example **"Selected start date is not available"**. Pick other dates or another option. See [Listing Availability](https://www.twicecommerce.com/docs/concepts/catalog/availability.md).

> [accordion] The new line has no unit, or its unit reads Unassigned
>
> [Auto-Fulfillment](https://www.twicecommerce.com/docs/concepts/orders/auto-fulfillment.md#faqs) explains why a line ends up without a unit, and when your account hides the one it picked. Put a unit on the line from [Stock on an order](https://www.twicecommerce.com/docs/guides/orders/assign-stock-items).

## Related articles

> [card] [Order Lifecycle](https://www.twicecommerce.com/docs/concepts/orders/order-lifecycle.md)
>
> What each stage of an order lets you change.

> [card] [Changing an order](https://www.twicecommerce.com/docs/guides/orders/edit-an-order)
>
> Every walkthrough for changing an order a customer already has.

> [card] [Change the dates on an order](https://www.twicecommerce.com/docs/guides/orders/change-the-dates-on-an-order.md)
>
> Move a line's dates and choose which price it keeps.

> [card] [Remove an item](https://www.twicecommerce.com/docs/guides/orders/remove-an-item.md)
>
> Take a line off an order again.

> [card] [Listing Availability](https://www.twicecommerce.com/docs/concepts/catalog/availability.md)
>
> What the free count beside each listing counts.


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