If you were not legally married on 12/31/2023 then you have to file as Single on your 2023 tax return.
Selecting which 2? Divorced, unmarried and Single are all the same as Single. If you were Divorced by Dec 31 you are Single for the whole year.
Getting Divorced article
https://turbotax.intuit.com/tax-tips/marriage/getting-divorced/L20NC66cf
Video tips for Divorced couples
https://turbotax.intuit.com/tax-tips/marriage/video-tax-tips-for-divorced-couples/L8YqvF7p5
And see what AGI to use
https://ttlc.intuit.com/community/agi/help/what-agi-should-i-enter-if-i-m-recently-divorced-or-widowed/00/26954
If you used Turbo Tax last year you should start a brand new account for yourself and not transfer from last year. Online is only good for 1 return. But you can use the same email address for 5 accounts. How to start another return in the Online version
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-start-another-return-in-turbotax-online/00/25596
If your divorce was finalized by the end of 2023, you will be filing as Single for 2023, or ......if you are the custodial parent of the children....maybe as Head of Household. You cannot file as "married."
There are different standard deduction amounts for Single and Head of Household.
Am I Head of Household?
https://ttlc.intuit.com/questions/1894553-do-i-qualify-for-head-of-household
https://ttlc.intuit.com/questions/2900097-what-is-a-qualifying-person-for-head-of-household
If you qualify as Head of Household, when you enter your marital status (single or married filing separately) into MyInfo, and then enter your qualifying dependent, TurboTax will offer HOH as your filing status.
Your standard deduction lowers your taxable income. It is not a refund. You will see your standard or itemized deduction amount on line 12 of your 2023 Form 1040.
2023 STANDARD DEDUCTION AMOUNTS
SINGLE $13,850 (65 or older/legally blind + $1850)
MARRIED FILING SEPARATELY $13,850 (65 or older/legally blind + $1500)
MARRIED FILING JOINTLY $27,700 (65+/legally blind) ) + $1500 per spouse
HEAD OF HOUSEHOLD $20,800 (65 or older/blind) + $1850)