Input on Seized goods by custom

We imported goods which arrived in the month of March and April and BE filed in respective months.The said goods were seized by Custom Authorities on pretext of misdeclaration.They load the value and re access the duty calculation and panelty.All this procedure taking time. It seems that all this will take anothe 10 days for delivery.Will we be entitle to take input of CVD and SAD as it is or we have to modify BE's as per GST?Please advice.Thanks.