when correcting taxable cashbook transactions allow the option to post the correction in the output/input goods boxes on vat return

I thought this had already been logged but I cannot find it currently when you post a non taxable receipt and need to correct it (or vice versa) the payment will show in purchase goods column rather than remove it out the sales, this isn't really correct if its correcting a mistake there should be an option to choose whether it is actually a purchase or sales correction, which will ensure the vat sales/purchases are correct.