Quarterly tax for Montana

I am new and it is time to do the quarterly taxes I went to the state site and don’t know which form to get. This is for Montana

Your filing quarterly state taxes, or quarterly state and federal? And, out of curiosity, are you getting a 1099-MISC from AirBnb?

I am doing state sales and use tax for Montana and I have nothing from airbnb.

It is my understanding that Airbnb is collecting the ‘bed tax’ and related hospitality taxes. You should just be on the hook for the usual quarterly pre-payments on estimated income. Seems like the Estimated Income Tax Worksheet (https://app.mt.gov/myrevenue/Endpoint/Form/90) should be what you need to get you pointed in the right direction.