One attractive outcome of this year’s legislative session is property tax relief. From the Department of Revenue:

https://mtrevenue.gov/taxes/2023-montana-tax-rebates/

Property Tax Rebate (HB222)

What is the Property Tax Rebate?
The Property Tax Rebate is a rebate of up to $500 a year of property taxes on a principal residence paid for 2022 and 2023.

How much is the Property Tax Rebate?
For each year, the rebate is the lesser of:
the actual amount of property tax you paid for your principal Montana residence, or
$500.

The 2022 Property Tax Rebate is a rebate of property taxes assessed and paid on the bill that had the first-half payment due in November 2022 and the second-half payment due in May 2023.
The 2023 Property Tax Rebate is a rebate of property taxes assessed and paid on the bill that had the first-half payment due in November 2023 and the second-half payment due in May 2024.

What are the qualifications?
You qualify for a Property Tax Rebate if you:
owned and lived in a Montana property as your principal residence for at least 7 months of each year, and
were assessed and paid property taxes on this residence in the relevant tax year(s).

How do I claim a rebate?
Taxpayers may claim the 2022 rebate online through our TransAction Portal or by paper form beginning August 15, 2023. The claim must be filed by October 1, 2023.
Taxpayers may claim the 2023 rebate online through our TransAction Portal or by paper form beginning August 15, 2024. The claim must be filed by October 1, 2024.

I think the Transaction Portal is not set up to handle this yet, but presumably by the open filing date (August 15) in will be clear what to do.