Dear Vikram Ji,
LTA when actually availed of for self and dependant family members after completion of one year service (once in a block of four years), is not taxable subject to production of actual rail/air tickets. Amount spent on lodging and boarding, sight seeing etc. is not considered for tax exemption. Only to and fro travelling expenses considered.
Gratuity being terminal benefit, is not taxable at all. Encashment of leave received as a result of termination of service, is also not taxable. Company contribution to one's PF account, received after five year service is not taxable. When it is received before completion of 5 years, it is taxable income. Own subscription to PF received after closure of PF account is not taxable, irrespective of number of years of service.