Starting from the Dashboard you could see -> button just expand that you will get a list of menu.

 Choose the Admin tab from the list menu.

By default the facility tab is shown.

Simply choose on "customization" and click on the "Invoice" sub-tab

You can customize your Invoice by entering the details of “Storage name, Address, Mobile no, Email Id, Sales & Remit payment” and check the preview then click Update button to save the changes.