While we can provide answers to certain questions in this forum, we're unable to come and set up things in your office.
Please know that I'm always around to help you with any QuickBooks issues you may be having. Feel free to update this post and provide what settings you are trying to setup.
The GST Central link provides instructional content for GST, PAYGW, PAYGI, Other tax and e-lodgement capabilities in QuickBooks Online.
Our QuickBooks Online Support Team can also pull up your account in a secure environment, and do screen-sharing to help ensure you'll succeed. To get in touch with them: