I'll direct you to the best team that provides further assistance with your inquiry about paying your first quarter tax in QuickBooks Online.
I understand you've already contacted our support team and are awaiting their response. I recommend contacting them again, as your concern has already been brought to their attention.
- Click the Help (?) icon.
- Navigate to the Assistant
- Enter a question or topic you need help with.
- Respond until you reach the option to chat with our Live support team.

You can reach them anytime using QuickBooks Payroll Premium and Elite plan. They are also available Monday to Friday, 6 AM to 6 PM PT for QuickBooks Payroll Core.
Also, here is an article to guide you on handling rejected e-filed tax forms or e-paid tax payments: Handle payroll e-file and e-pay rejections.
Don't hesitate to comment below if you have further questions about e-filing tax in QuickBooks Online.