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[VolvoGirl]

Based on what you posted you should be Head of Household. 

If you had a child born in 2022- Add them under My Info. You need to answer 2 questions…..

Did your child live with you for the whole year? Answer YES even if they were born late in the year (even on Dec 31).

Then was at least half of child's expenses paid by CHILD? Usually is NO.

[DoninGA]

If you were still legally married on 12/31/2023 you have to select Married and then choose Separate.

When entering the child as a dependent make sure that you select the Whole Year for how long they lived in your home.  The TurboTax program will ask you a series of questions to find out if you are eligible for Head of Household filing status.  Such as - Did you live with your spouse at any time during the last six months of year and did you provide over one-half the cost to maintain your home.

See this TurboTax support FAQ for Head of Household when married - https://ttlc.intuit.com/turbotax-support/en-us/help-article/taxation/married-person-claim-head-house...