How to fill two state returns without paying more taxes than necessary?
In 2025 I lived in Montana for 4 months and then California for the rest of the year. I've gone through both tax returns on Free Tax USA since I had a job in each state. In total, I made around $40k for the whole year, with 10k from my job in Montana and 30k from my job in California. For both returns, I said I was a part time resident and listed the dates I was in each state. I also added the income I made from each job.
For the Montana return, it says my "Federal Taxable Income for Montana" and "Montana Taxable Income" is $25,000, which I am guessing is calculated by subtracting the Federal Standard Deductions and other Montana deductions ($15,000) from my Federal Adjusted Gross Income ($40,000). Consequently I owe Montana a decent amount of money.
I only made 10,000 in Montana and already paid taxes on that income. I don't think I should pay more since the rest of my income was made in another state where I also paid taxes already.
Is there a way to fill out the Montana form so that it only focuses on the 10k I made?