If you and the other parent live together, only one of you can claim the child for any tax benefit. The interview is confusing (it's designed for divorced parents). The second parent should not enter the child, at all.
You may decide between you who will claim the child, but only one of you can do so.
You can NOT do what you are trying to do; mother claim EIC and father claim dependent. You may have heard of a special rule in the case of divorced
& separated (including never married) parents that allows them to do
that. This "splitting of the child" is not available to parents who lived
together at any time during
the last 6 months of the year; then only
one of you can claim the child for any tax reasons.
