Invoice before GST

Harish Chand Saini (226 Points)

25 March 2018  
sir,

on going dispute with supplier/transporter we received an invoice with material on dt: 23.03.2018
while invoice dt: 15.04.2017
as per old regime this material is exempted /without tax but in current regime material is 18%

pl guide where can we show this invoice in gst ledgers. Is it is comes under reverse charge ?