Which inputs produce a reliable result
For chart-based tools, birth date, birth time, birth place, and timezone matter most. An approximate hour can shift lagna and house-based reading, so hospital notes or a family kundli time are safer than guessing.
For Panchang or muhurta tools, place, date, and timezone are required.
If geocoding is unclear, edit coordinates. Wrong place data can move both sunrise-based angas and lagna-based conclusions.