Welcome to the Community, @beheratapas. I'll help you out with your QuickBooks Online (QBO) concern.
Before we can proceed, I'd like to ask for additional details on your concern. This way, I can provide you the correct steps to resolve your concern. Or share an answer to your question.
If you want to proceed with contacting our Technical Support team, refer to this article for the steps: QuickBooks Online Support. Please take note of their operating hours, so you know when they're available.
Feel free to hit the Reply button and post a comment below if you have other questions. I'll be sure to get back to you. Have a nice day!