Thanks for posting to the Community, @AirikFresquez.
The option to choose as Head of Household in Montana filing status is unavailable in QuickBooks right now. I recognize the importance of this option in the filing status, and I'm taking note of this one. Please know our engineers are always working with the updates and coordinates with the state's protocols for tax calculations and requirements.
For now, I encourage you to visit our Firm for the Future site to stay updated with our news and product enhancements. From there, you can choose the specific tags that you wanted to view, like Tax Planning and Feature.
I've added handy articles as your references to review lists of the tax forms, withholdings, unemployment tax forms, and other details included in your product:
Also, I'd suggest consulting a tax accountant for the head of household status tax calculation so that we can assist you on how to set it up in QuickBooks.
If you have other concerns or questions, feel free to drop a comment so that I can help. Stay safe and more power to your business!