If you are filing jointly with your spouse it does not matter if you live with them at all as long as one of the joint spouses does. A joint return is one return for both of you. There is no question question of custody or who lived with the child on a joint return, that is only for married filing separately for parents that are separated and live apart.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
