You would have received this if you claimed points for self employed.
1. You can prepare one yourself, however, if you get one from the company who was your client, on their letter head and with your job duties, that would be ideal.
2. As long as your clients can affirm, and you can substantiate it with your business, by showing lease for business, business registration , etc, you ill be fine. IRCC states:
- if the applicant is self-employed, articles of incorporation or other evidence of business ownership, evidence of self-employment income and documentation from third-party individuals indicating the service provided along with payment details (self-declared main duties or affidavits are not acceptable proof of self-employed work experience).
3. Lines of business means what all did you do as a part of your business. Eg. If you were a medical doctor, what kind of patients you treated and what procedures you had. If you were an engineer, what kind of work you did, as in your specialisation, the consultations you gave and the projects you undertook.