Help with 2023 W4 form

My husbands employer changed his with holdings without telling him or his permission. They put federal M00.  We do not want gov to hold on to our money. Would rather balance or owe a little.

So We can't figure out the new form. It assume there's 2 incomes.

Only my husband works, no more dependents, no ira contributions, 401k contribution.

 We don't understand how to fill out since I do NOT WORK.

Checked married filed jointly but don't understand step 2 or 3?

Are we just suppose to check married file joint and nothing else and let them assume we want them to hold on to our money?

Need help.