Your spouse did not change his W-2. He may have changed the W-4 that he gave to the employer to indicate how much tax he wants withheld from his paychecks. There is no such thing as claiming a dependent for part of the year. You claim a dependent all year or not at all. There is only a short time left for 2023 anyhow, so it's up to you and your spouse whether he wants to annoy his employer by changing the W-4 again.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
