The CRA permits you to enroll for a BN various ways:
1. On the web
The CRA's online entry is suggested for organizations with straightforward enlistment necessities and can be found here.
2. Via Mail or Fax
In the event that you need to print a structure, go to Form RC1, Request for a business number and certain program accounts. Fill in structure RC1, and once finished, mail or fax it to your closest duty administration office or expense focus.
3. By Phone
To acquire a BN and register for CRA program accounts by telephone, call 1-800-959-5525. Prior to calling, be prepared to respond to all the inquiries in Part An of Form RC1, Request for a business number and certain program accounts, and some other inquiries in the structure about the CRA program accounts you need to open.
Note: If you work in Québec, you should counsel Businesses working in Québec and GST/HST program accounts.
For more data about business number enlistment, if you don't mind counsel the CRA's convenient online guide.