Tax credits paid through the Canada Child Benefit, or CCB, are based on your income and not its source, so even if you’re self-employed you may qualify. The benefit is paid to primary caregivers of a child under age 18 as long as one spouse or common-law partner is a Canadian citizen or has residency status. You can apply for the CCB by creating an online account with the Canada Revenue Agency, or by mailing in a CCB application.
Other credits which self-employed Canadians are entitled to claim because they are based on something other than the source of income, are the GST/HST credit and the Climate Action Initiative credit.
For more information, please refer to the links below from the CRA: