Tax Filing

A guided workflow for preparing US federal income tax returns. This skill covers all filer types — US citizens, resident aliens (RA), and nonresident aliens (NRA) — by first determining the correct filer type, then routing to the appropriate forms and procedures. Both citizen/RA and NRA workflows are fully self-contained in this skill, including PDF form field mappings, cross-form validation, and the safe `update_form.py` script.