The Goods and Services Tax/Harmonized Sales Tax (GST/HST) registration number is required for FUB to continue offering services in Canada and to comply with Canadian Revenue Agency regulations.
What is the GST/HST registration number, and where can I find it?
The GST/HST account number is an alphanumeric code made up of your nine-digit business number, followed by RT 0001 (or a higher number if your company has multiple branches or divisions). This number is used to file GST/HST returns, make remittances, and signal to customers and the government that you're legitimately calculating and remitting taxes.
FAQ
How long will my information be stored?
Regulations require this information to be maintained for at least 10 years. Source: Government of Canada