When your customers reply to the Invoice you've sent through email, their reply will go to the Customer-facing email address that you've set up in your QuickBooks Online account, Sovay.
This email can be your company email or a different email address. To check or change this email address, please follow the steps below:
Click the Gear icon in QuickBooks Online.
Select Account and Settings.
Go to the Company tab.
In the Contact info section, click the Pencil icon to edit.
I'll share information and troubleshooting details to ensure you're able to see the customer replies from the invoice email you've sent.
The customer replies should be sent to your email. Since you haven't received responses from your clients, I recommend checking your spam and junk folders, as important emails sometimes end up there. If you see one of the emails from them, right-click it, then select This is not spam or Not Junk.
Ifyou're still having troubles receiving their reply, I recommend contacting your email provider. They can help you further evaluate security settings for your email profile.