It depends on which rounds you are asking about. The maximum amounts are listed below. Incomes above $75,000 (150,000 jointly) would see these amount phased out.
Round one: 1200 (2400 if filed jointly) plus 500 per qualifying dependent child age 16 or under
Round two: 600 (1200 if filed jointly) plus 600 per qualifying dependent child age 16 or under
Round three: 1400 (2800 if filed jointly) plus 1400 per qualifying dependent child age 16 or under