> For the complete documentation index, see [llms.txt](https://docs.sirplugin.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sirplugin.com/faqs/billing.md). # Billing Questions ### What payment methods do you accept? We accept all major credit and debit cards, Apple Pay, Google Pay. ### Can I upgrade to another license later? and how much should I pay? Yes you can! and you only pay difference in price. Ready to upgrade? [contact us](https://sirplugin.com/contact.html). ### How is VAT handled? VAT is automatically handled during checkout. If you have a VAT ID, you can enter it during the process, and our payment processor will calculate the appropriate VAT based on your location and status. ### How do I get an invoice? After your purchase, you will receive a receipt with an attached PDF invoice for your payment. ### How do I download the plugin and license key? After purchase, you will receive an email including your download link and license key. If you haven't receive it, please reach us out at ### Do you offer refunds? Yes, we offer a 14-day money-back guarantee on all plans. If you're not satisfied with the plugin, you can request a full refund within 14 days of your purchase. [see our refund policy](http://sirplugin.com/refund-policy.html) for more information. ### Having a trouble making your purchase or haven't received the product? Contact us at --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.sirplugin.com/faqs/billing.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.