GST Return - Cash Basis

Hi - this relates to "Cash" based GST returns where the return needs to reflect when the payment is made and not when the Bank Feed registers the "date processed". Specially relates to Credit Card transactions and when the Cr Card bank feed is loaded - this will show the date the charge is processed on not the date payment to the Cr Card co is made. The latter is required for a cash based GST Return to IRD NZ. Is there a way of being able to adjust the date on a bank feed to resolve this issue?