Here are the Benefit and Credit payment schedules for 2018/2019.
These are all based on Family Net Income.
Unless you have elected to have the WITB paid throughout the year it will be paid out with your tax refund.
In order to avoid delayed payments make sure that your taxes are filed on time.
If you’d like to get an estimate of what your payments could be CRA has an online calculator tool:
https://www.canada.ca/en/revenue-agency/services/child-family-benefits/child-family-benefits-calculator.html
