My online payments got denied and I recently sent a invoice to customer

How big was your invoice amount?

Hello baljeet-pbxtechn. It's essential you know why the online payments on your account have been denied. I highly recommend contacting our support team outside of the Community. A specialist will be happy to take a look at your account and investigate this further. Here are our contact details: 

• Schedule a Callback or start a Chat: click (?)Help in the upper right in QuickBooks Online > type and enter "Contact support" into the QB Assistant > click Contact Us > explain your situation > click Let's Talk > choose Get a callback or Start a Chat.
• Social Media: Facebook, Twitter, and Instagram.
• Support hours are from Monday to Friday between 9 a.m. and 8 p.m. ET.

Let me know if you have other questions, I'm here to help you get back on track with your work.