To add a quotation start by using the side menu and clicking quotations:
You will then be taken to the quotations page:
Add a new quotation by clicking the blue "New Quotation" button, you will then be taken to this page:
Here you will choose the client you are sending the quotation to, then the quotation’s expiry date and what product and quantity is being quoted, then lastly select whether or not VAT is included, then click save. You will then be taken to this page: 
Here you will then be given the option to change or update information in the quotation by clicking the edit button, you can then export the quotation to a PDF document or send it directly to the client.