While we round to re 1 qbs is not sending invoice , which means mail sending error how to resolve this

Hello manohardas-tlc-e,

Can you share with me the exact error message when you email an invoice? 

In the meantime, let's run some troubleshooting steps to isolate what causes the error message. 

To start with, let's open QuickBooks on an incognito window. It is where we can confirm if the error is cause by a browser-related issue. I've added these keyboard keys to open one:

• Google Chrome: Ctrl + Shift + N
• Mozilla Firefox: Ctrl + Shift + P
• Microsoft Edge: Ctrl + Shift + P
• Safari: Command + Shift + N

If you're able to email an invoice, we can go back to a regular browser and clear the cache. Once cache is piled up, it can be the reason for some unexpected browser issues. 

 We also have the option to switch to a different browser like Google Chrome, Mozilla Firefox, Safari, or Microsoft Edge as an alternative.

Also, if you want to add logo on the sales forms, you can check this reference: Add, customise, or remove logos on sales forms.

Get in touch with me if you have concerns with sending an online invoice. I've got you!