Status of mandi tax in gst

We are the manufacturer of pulses, currently there is 2% of mandi tax and 0.5 % vikas cess total 2.5% on pulses in U.P.. What will be the status of this tax after GST. In present when we purchase pulses from Maharastra or M.P. we have to pay mandi tax to their state and when we process that pulses in our state U.P. and sale it to Uttarakhand then we have to pay mandi tax to U.P. and then Uttarakhand also imposes mandi tax on that pulses, so mandi tax on pulses is imposes on every state. Pl. tell us about the status of mandi tax after GST as our govt. says one nation one tax.