How to book foreign gain or loss ???

Digambar Kundaram (Pune) (65 Points)

12 June 2012  

Dear all,

If I have booked sale entry in the month of Jan-2012 to customer of outside india in USD, i.e. (USD rate was 39.30)

Sale               - 30000 USD (18,00,000 INR)

Service Tax  -   3090 USD (185400 INR)

Tota              -  33090 USD (1985400 INR)

Now towards this invoice I received payment in the month of May-2012l, Now please tell me How to book entry in the end of the year i.e. on 31st March-2012 and April-2012 too