How to un file the tax return in online quick books?
Welcome to the Community, @j-gaupo-emarineh. Let me route you on the right path to support your query about unfiling tax returns in QuickBooks Online (QBO).
You can resolve this situation with the help of our Technical Support team. They can pull up your account info and submit the unfile request. Check out this article for more details: How to unfile VAT/GST.
With that said, please follow the steps in this article: How and when can I contact Support? It has the steps on how you can reach our Technical Support, along with their operating hours, so you know when they're available.
Feel free to mention me (@Jovychris_A) in a comment below if you have other questions about sales tax in QBO. My hands are always open to help you out. Take care!