> ## Documentation Index
> Fetch the complete documentation index at: https://docs.upmind.com/llms.txt
> Use this file to discover all available pages before exploring further.
# How to Add Additional Information to an Invoice
> Adding notes, fields, or custom info.
Upmind lets you add extra information to invoices using key-value pairs as metadata, which is especially useful for including additional records when reporting to external fiscal authorities.
## Adding metadata to an invoice
1. Go to **Client** > **Billing**.
2. Select the invoice you wish to update.
3. Select an invoice, scroll down, and click **Manage metadata** under **Quick Actions**. This is useful for adding fiscal authority references, purchase order numbers, or custom notes.
4. Enter a **Meta Key** and **Meta Value**.
* A meta key is a unique identifier or name used to store specific information.
* A meta value is the actual data.
5. Click **Save** to add the information to the invoice.
6. Metadata is displayed on the invoice, visible to both admins and clients as needed.
