Correcting an incorrect quarterly return?

Hello

It appears that I incorrectly submitted a number of expenses last quarter; receipts where the vAT amount was listed separately and which I assumed I could recover, but unfortunately I was mistaken, as I now realise… I received a large vAT refund last quarter and the error is relatively minor. However, is it possible to correct this in the next quarterly return?

Thanks in advance!

Christof