Is it permissible to charge the company for the taxi fare if less expensive and more arduous public transportation was used?

If you use public transportation, it is not permissible to claim taxi fare from the company, as this involves deception, lying, and devouring wealth unlawfully. The company does not give you a transportation allowance to dispose of as you wish; rather, it gives you the transportation allowance that you actually pay. What is incumbent upon you is truthfulness and trustworthiness.