Every month Quickbooks charging me twice the invoice. But showing invoice online once in a month. Why it is happening?

I'm here to make sure your concern will be addressed properly without a moment's delay, @useraccountant.

To clarify, are you referring to your QuickBooks Online subscription billing? Since your concern is sensitive and requires confidential information about your Intuit account, I recommend reaching out our QuickBooks Customer Care Team. They can verify why you're being charged twice and take further action. 

Here's how to reach out to them:

1. Click the (?) Help icon in the upper right-hand corner of the Dashboard.
2. Select Talk to a Human.
3. Enter a short description of your concern and press Enter.
4. Click I still need a human.
5. Select Contact Us to connect with our live support.
6. Choose Start a chat.
   

To reach us on time, our Live Help is available from 6:00 AM to 6:00 PM on weekdays and 6:00 AM til 3:00 PM on Saturdays.

This should point you in the right direction. You can always visit us here in the Community if you have any general questions about QuickBooks. I'll be around to help you.