How to get refund total amount from form 16

the person doing army job

'X ' person geting gross salary  Rs.509898 Per Year

Less Allowance u/s 10             Rs.1200.00

Balance                                  Rs.508698.00

u/s 80 C                                  Rs.42543.00

Taxable amt.                            Rs.466160

Tax deducted Amt.                   Rs.20206/-

He will get HRA 4200/-

The person asking, the deducted total amt. we will get refund.  It is possible in income tax returns. if it is posible kindly inform to me how to submit IT return. how we will take HRA. plz inform HRA caluclation to me.