You can add fees or taxes in your form either:
- For fixed fees (e.g. postage), we recommend using a Price field.
- For a percentage tax on charges, you can set the "Payment tax percentage" under Configure > Payments, or you can, using Custom Pricing Rules
- For a percentage tax on Stripe subscriptions created through Paperform, you can also set the "Subscription tax percentage" under Configure > Payments. Note that subscriptions are handled independently of normal charges.