"You still haven't addressed why you were mentioning 1040 when I never did"

You kept asking for MT 1041, which doesn't exist, the same way there is no MT 1040. Do you realize how many people post on this forum that are not even US preparers? Nearly everything can be outsourced, and we see some amazing questions. No one here knows you, who you are, where you are, what you know professionally. Other than, with everything in this topic, you are giving a great representation of your true personality.

Do you even remember what you first asked: "Does Montana require a 1041 return?"

I provided links to the topics that explained what you wanted is FID-3 and to the place to Download it and if you were submitting it paperfile, it would need to include the paper 1041.

"It appears MT has a Trust return that has to be filled out manually since Pro Series doesn't support for unknown reasons."

It's not really "unknown." It's a matter of marketing.

Nope; there is nothing else to discuss.