If my child didn't live with me the whole year do I still put them on my taxes but then put down they lived with me 0 months or do I say I don't support anyone

[Phillip1]

If there is an agreement between you and the other parent (with a signed Form 8332) that allows you to claim your child as a dependent, you should enter them in your return. In this case do the following:

• Enter their personal information in the Personal Info section.
• Mark that the lived with you for less than 6 months (0 months).
• Continue to the screen that asks if there is a "custody agreement".
• Answer yes, there is a custody agreement.
• Answer no, the other parent will not claim them as a dependent.

If there is no agreement (no Form 8332) you should not enter your child's information on your return.