Filing returns

Sir,

Please tell me ,

One of our sister concern has started business of automobile spare parts sale in the mont of July 2008 but has only taken registration for VAT in the month of 23.10.2008

We have shown purhases in our book from july 2008 and sales thereto.

Now my question is whether while filing returns from 1.10.08 to 31.12.08  , can we show the purchases  done in the month of july 08 and claim input on that.

Secondly if we don't show the july month purchases in the returns , it won't tally with p & L figure in the year end.

Kindly advise.

Very urgent.

Thanks

Sushant