Mumbai VAT return (Sales Return)

In Maharashtra, can v carry forward excess vat paid in next Financial Year? During the last 5 months in F.Y. 2008-09, our sales return were higher than sales and we could not filed negative vat return since it was not accepted in dept.'s software. So, my question is that can we take excess sales return in the m/o Apr.09 and onwards?

Pls. reply.