## Zoho Invoice — Product, features, payments, integrations, solutions, and help Index Access the complete documentation index at: https://www.zoho.com/za/invoice/llms.txt Use this file to discover all available documentation pages before proceeding. # Invoice Preferences You can configure the invoice preferences, custom fields, terms and conditions in Zoho Invoice settings. To navigate to the **Invoice Preferences** page: * Go to _Settings_ from the top-right corner. * Click **Invoices**. Alternatively, if you’re in the Invoices module, you can navigate to invoice preferences by clicking **More** at the top and selecting **Preferences**. You will be redirected to the _Preferences_ tab under _Invoices_. * Check the **Allow editing of Sent Invoice** option to edit an already sent invoice. Leave this option unchecked if you do not want to edit a sent invoice. * Check the **Associate and display expense receipts in Invoice PDF** option to be able to attach the expenses incurred on behalf of the customer to the invoice. * Check the **Get notified when customers pay online** option under Payments to be notified when you receive payments online. * Check the **Do you want to include the payment receipt along with the Thank You note?** option to include a payment receipt along with the thank you note email. * Check the **Automate thank you note to customer on receipt of online payment** option to automatically send a thank you note to your customer when they pay online for an invoice. * Slide the toggle next to **Invoice QR Code** if you want to display QR code on the PDF copy of your Invoices. You can configure the QR code after sliding the toggle. * Enter the **Terms & Conditions** pertaining to the invoice. * Enter any general notes that you want to share with your customer in **Customer Notes**. * Click **Save** to save all the changes. ![Terms & Conditions of Invoice](/invoice/help/images/invoice/invoice-preference-conditions.png) ### Adding Custom Fields Let’s take an analogy to understand custom fields better; if you have an office with folders stacked in a shelf, **Custom Fields** are like extra folders that you can add to your already existing folders to store more files. **Custom Fields** are fields that you can manually add to the invoice creation page to store additional information relating to the invoice. To create a Custom Field: * Go to _Settings_ from the top-right corner. * Click **Invoices**. * Select the **Field Customization** tab. * Click **\+ New Custom Field** at the top-right corner. * Enter the _Label Name_, _Data Type_ and other necessary details. * Click **Save**. Learn more about [Custom Fields](https://www.zoho.com/za/invoice/help/settings/preferences.html#field-customization). ## You might also find these helpful [ ### Creating Invoices Explore the various ways to create, customize, and edit invoices. ](/za/invoice/help/invoice/new-invoice.html?src=help-other-resources)[ ### PDF Templates Customize your templates for various transactions to match your brand and preferences. ](/za/invoice/help/settings/templates.html?src=help-other-resources)[ ### Managing Invoices Manage invoices in Zoho Invoice by customizing, filtering, and sorting them easily. ](/za/invoice/help/invoice/more-with-invoice.html?src=help-other-resources)