Your tax ID number is the number you use to file your entity’s tax reporting each year, whether you are filing taxes for an individual, a corporation, or any other entity type. If your entity is new and you have not yet filed taxes, your tax ID number would be included in your incorporation documents.
If you currently file taxes as an individual and do not have a Business number, then your tax ID number would be your Social Insurance Number (in Canada) or equivalent country-specific tax ID number such as a Social Security Number.
