Thanks for writing back again, and anything else you can add. Yeah I knew (although failed to state it) that in Colorado it's common advice to be sure to file a tax return even if your liability is zero, even if your taxable INCOME is zero, to get the TABOR refund. That's why without any evidence explicitly saying so, I didn't think that a NEGATIVE AGI would disqualify anyone.
As for "I can imagine" how you don't have access to the product developers and maintainers, unfortunately I can related because my career was also doing (software) development for a large company with all associated organization bureaucracy etc. BUT when you post here, labeled as an employee -- I/we assume you are a public face of the company and SHOULD be able to connect with those experts as needed. I certainly spent time filing internal defect reports, chasing down present package owners who could resolve my customers' issues, etc.
