Start a new account if you will be using online, because if you use an old account that you used for joint returns it will be really messy and give you errors; it is too hard to get all of the "spouse stuff" out.
If you were divorced by the end of 2022 then you must file Single or maybe Head of Household if you happen to be the custodial parent of the children. You will not file as married.
**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.**