I actually did find another thread on this topic, which was addressed by @SusanY1
I don't know why I didn't find this on my earlier topic searches...
Anyway, here's the thread for reference. I'll be digesting this and running some what-if scenarios...
https://ttlc.intuit.com/community/taxes/discussion/re-sc-state-addback-tax-calculation-2025-error/01...
