Mvat

If goods are received in Oct, then should be recorded in Oct.
Instead of revising return now, I guess VAT audit will be applicable, so after VAT audit one revised return to sum up all can be filled. And as it increases purchases, hence credit of VAT, so u can carry forward it to next.
You can revise return only once before VAT audit and one considering all effects after VAT audit. So decide it as per information by your regular VAT auditor or accountant, what process they follow.

Hope this help u

you have to use single annexure template for multiple return forms under VAT Act and CST Act for same periodicity.