> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.seino.ai/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# What happens if I change my billing period?

You can switch between monthly and yearly billing at any time. We don’t offer refunds, but any unused balance will be applied as credit toward your future invoices.