You can add the Tax Calculated Amount Field with Paymattic to automatically generate tax amounts for an item.
Follow this step-by-step guide to know how to add the Tax Calculated Amount Field.
- To add the Tax Calculated Amount, first, you need to create a form. Let’s take a look at how to create a payment form.
- Then, add general fields according to your need.
- Then, add the Tax Calculated Amount Field from the panel of Form Editor.

Now, you need to configure the field that best suits your need.
To perfectly optimize the field, you need to have a clear idea about the configuration options.
Tax Percentage: The percentage of the total tax required to pay for the item.

Target Product Item: Here you can select the product where this tax percentage will be applied.
Advanced Options #
You can define a custom Admin Label and CSS Class in the Advanced tab of the Donation Progress Item field.
Admin Label: This label is used if the admin wants to see the field’s label from the back-end.
Field Wrapper CSS Class: This is a field used for adding a CSS class for the field wrapper element.

Input Element CSS Class: You can add custom CSS classes to the input field element itself.
Conditional render: You can set conditional logic to display the field in the form that will be triggered by specific actions taken on a previous input field. To know more about, Conditional render, check here.
Field ID: The Field ID option in the Advanced tab is the CSS class ID for this input field, and it will be used for adding custom CSS to this field.
Finally, click on the Update button to save the configuration.
Copy and paste the shortcode of the form on a specific page and you can preview your created form.