If you were divorced on December 31st, then you are not considered married and would not use one of the married filing statuses; no ex-spouse information will go on your return.
However, if you were still married on December 31, 2023, you are still considered married for tax purposes. You could then choose to file as married filing separate. In that case you would need to enter your spouse's name and social security number on your return.
In addition to what DoninGA posted, if you are using the married filing separate status, you also both are required to choose the same deductions. For example, if one is itemizing the other must itemize or both use the standard deduction.
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