TurboTax does not allow changing state filing status. I know from using Taxslayer that you can change your filing status from MFJ to MFS for Montana to take advantage of some deductions - like the pension annuity exclusion or higher itemized health deductions.
You can file as married filing jointly on your federal return and as married filing separately on your state return. Please follow the directions below to do so.
The link you provided doesn't work: "Not Found. Redirecting to https://ttlc.intuit.com/community/home/misc/03/en-us." Every year, for years, TurboTax has allowed me to file as married filing jointly on my Federal return, and married filing combined separate on my Montana return. This year I did not get the option and I can't find where to change it. If I go into my Personal Info it only has one option for filing status which I assume refers to Federal filing status. There is no option to choose a different filing status for State. When I start my State return, it doesn't ask about filing status (it always has in past years). I need to change it to complete my return. Any help would be much appreciated!
I answered my own question:
Under the new law, taxpayers must use the same filing status used on the federal tax return. These filing statuses include married filing jointly, qualifying surviving spouse, head of household, single, and married filing separately. When filing the Montana Form 2, each of these filing statuses is considered the same as the federal filing status. Married taxpayers can no longer file separately from their spouses unless they are filing separately for federal purposes. Capital losses, passive losses, and excess business losses will no longer be allocated by spouse and will be treated the same as they are for federal purposes.
Source: Montana Tax Simplification Resource Hub - Montana Department of Revenue