Aditya, Are you still working on this?
It would help if you had input for KIAS, altitude, and tailwind components. This would make it more flexible using for the KTAS calculation.
Turn radius parameters always begin with a fix at the beginning of the turn, you can then add the wind component with angle. This will be used to determine the max bank angle, not simply bank angle. Winds have significant effect on bank angle.
FAA/ICAO calculations use a 50kt tailwind that follows the ac through the turn, so it simply adds 50 kts to the entire path. Other proprietary software uses the wind component, usually to advantage in the max bank angle determination.