For tribal income, I would take a look at this site to see if there is any guidance there:

http://www.ncai.org/policy-issues/tribal-governance/taxation

I did try and duplicate what you are seeing in Lacerte and I am not able to. I am not getting a deduction for other income. I would make sure that Lacerte is up-to-date:

Downloading and Installing Lacerte Program Updates

https://accountants-community.intuit.com/articles/1606467-downloading-and-installing-lacerte-program...