Invoice can be printed for having record of data or to pprovide hard copy to customer. Follow the below process to print an invoice.
Business Portal > Sales > Sales Order New > Invoice Selection > Print Invoice
Go to the invoice whose details are to be printed and open the details of invoice
click on “Print” button from the Invoice detail page
Invoice will be opened to you in a proper forma. Click on “Print” button in the top right of the screen
The invoice will be printed to the selected printer