@tommyg2007 When all of you live together as a family, only one of the parents can enter the child on a tax return. There is no "splitting" of the child-related credits if you live together. That is only done when the parents are divorced or never married and live apart---sharing custody. That is not what you describe. So---one of you (the mother who is the higher earner) files HOH and claims the child for the child tax credit and perhaps childcare credit. You cannot put the child on your return to get EIC. You file Single and enter nothing about the child on your return.
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