First ... if you are still married as of 12/31/22 then you cannot file as single ... only married jointly or married separately unless one or both of you qualify for HOH. Next ... if you will file separately you should each use a new TT account ... do NOT try to reuse the current account.
1. Because my wife is self-employed, when I change in marital status in TT from married to say "Single", will the TT preserve all her business parts (amortization of assets, etc) and allocate her business into a separate account or will it just drop her off from my TT account? Again your marital status for 2022 cannot be single if you are still married as of 12/31. You each need to use new TT accounts.
2. Because she was the major contributor to AGI, she also paid most of the taxes. We'd normally carry over the tax refund into the next year instead of cashing it out so I kind of wonder if TT would allow me to allocate how much of the tax refund that would carry over from 2022 into 2023 belong to me vs. to my wife's ? No it will not/can not do this ... on the 2022 joint return you need to take the refund and split it any way you agree to ... do NOT apply it to the next year's return if you choose to file a joint 2022 return. If you choose to file separately this will get messy as the IRS would automatically apply all of the prior year refund to the primary taxpayer's SS# only so if you try to split it onto 2 separate returns you will have to deal with IRS letters and/or mail in the return with an explaination which may or may not be noticed. If you can agree you really should file one more joint return using the current account that you have and for the 2023 return start new accounts for each of you ... do NOT try to use the joint account going forward even though you are tempted to do so. ALSO make sure you each save PDF files (with and without the worksheets) & the .taxfiles of all the returns in this current account before you abandon it in the future.
