To print or email invoices after generating them, you need follow these steps:
Step 1: Go to Administration and click on configuration.
Step 2: Choose the Voucher Series Configuration option and select the voucher type of that you want to print or email, such as sale, purchase, etc.
Step 3: Then, select the voucher series and click on Voucher Configuration.
Step 4: Set Y on Print Invoice After Saving and Send Email After Saving.
Step 5: Now, when you save your invoices a window will pop up for print and email.