The 2 Business Number fields: These refer to business numbers of various kinds. If you intend to print invoices - you must put content here. It can be anything - your business registration number, a phone number, or anything. It will show on printed and emailed invoices. If you aren't going to print or send invoices - you do not need any content here.
Charges sales tax?:If any of the products you are selling incur sales tax in your province, you should select 'yes'. If not, select 'no'
Display logo on invoices: If you have uploaded a logo and you want it to display on your invoices, select the box
Add customized tax at the end of invoices: Whatever you write here will appear at the end of your invoices. It might be a thank-you, or other message to customers.
Terms and Conditions: see below