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# Can I add multiple values for a field in my transactions?

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Yes, you can. Zoho Billing lets you create custom fields with the **Multi-select Lookup** data type, which pulls values from an existing module. This is useful when you want to associate multiple entries such as additional salespersons, contacts, or items with a transaction.

To create a Lookup custom field:

*   Go to **Settings**.
*   Select the module (e.g., **Invoices** under _Sales_) where you want to add the field.
*   Click the **Field Customization** tab.
*   Click **\+ New Custom Field**.
*   Enter a name in the **Label Name** field.
*   Select **Multi-select Lookup** as the **Data Type**.
*   Choose the module you want the field to pull values from (e.g., _Salesperson_).
*   Click **Save**.

Once saved, the lookup field will appear when you create or edit a transaction in that module. You can select from the values available in the mapped module.

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