TaxAct Business Browser Automation Patterns When to Use Automating data entry in TaxAct Business online (www.taxact.com/online/) using Codex-in-Chrome MCP tools. Key Architecture TaxAct is an Ionic SPA — single-page app with shadow DOM components. Standard DOM queries often miss elements rendered inside web components. Navigation Field Interaction TaxAct uses React-style controlled inputs. Direct assignment is ignored. Use the native setter pattern: Field Discovery Fields have IDs like . No aria-labels. Map by Y-position: Radio Buttons Pattern: with name : Checkboxes Pattern: : Select/Picklis…