If you are still legally married at the end of 2022, your filing choices will be married filing jointly or married filing separately. Filing "single" will not be an option for 2022 for either of you. And since you lived together for more than six months in 2022 neither of you can file as Head of Household.
If you are divorced by the end of 2023 then when you file a 2023 tax return---in 2024--- you can either file as Single or --if you are the custodial parent of the children--Head of Household.
When you are divorced you will each need your own accounts and user ID's, and your finances and tax returns will completely independent of each other.
**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.**
