In a District of Columbia resident . I filed out my 2022 DC return using Turbotax but noticed that it did not subtract $10,000 from my Federal AGI on Schedule I, which DC residents are entitled to if there Federal AGI is less than $100,000 (which mine was). Is this a bug in TurboTax? If so, what recourse do I have against TurboTax?
The exclusion you refer to applies to disabled DC residents, not all DC residents.
According to Line 7a and 7b, Exclusions for DC residents in the Instructions for Schedule I:
Income not to exceed $10,000 is excludable in computing DC gross income for persons determined by the Social Security Administration to be totally and permanently disabled and who are receiving: Supplemental Security Income or Social Security Disability; or railroad retirement disability benefits; or federal or DC government disability benefits; and whose annual household adjusted gross income is less than $100,000.
You don't indicate that you have such a disability.