No series . for RG entry..

Dear ,

can any one tell me where to setup no. series for RG Entry ? i checked purchase & payable setup, sales & recievable setup .i could not find the place to enter ,no series for RG entry. can i get the suggession what to do now? actualy by mistake i have forgotten to change no. series for current financial year in RG ENTRY. Its taking the same no. of previous year in the RG 23A table.its 15 days passed since new financial year? can i cange the RG nos . without re doing entry for purchase & sale ? or if i let continue the previous no. series i.e of last year that is running without changing it than what may be the problems i will have to face …

Thanks to all…

Excise No. Series…