i want to request of refund after i downgraded my subscription but my Bill Number is not available in the history. how will i get the bill number

Since the bill number isn't showing in your billing history, we recommend contacting our QuickBooks Live Support team so they can pull it up on their end and assist you with your refund request directly.

Additionally, you can check out this article for more information on the refund process: Request a refund for your QuickBooks product.

Keep us posted if you need anything else.