GSTR 4

I am a composite dealer. I have to file GSTR4 for Q1 ( April to Jun 2018 )

I downloaded the B2B purchases from GSTR portal as JSON file and subsequently uploaded the same in GSTR4 .

After processing the " Get Summary " button, the summary shows the No. of invoices, Total purchase value, taxable purchase value,etc. But, the TAX AMOUNT  on my purhcases are shown in the tax column as Payable.

My supplier has already collected the GST on all these bills. Still, the tax amout is added to the GST payable on my  Sales Turnover.

The " Reverse  Charge " column in sheet 4A,4B is " No" and " Type " column is " Regular " for all the purchase bills.

What shall I do ?

Can I upload the GSTR 4 without giving the B2B purchases in Sheet 4A,4B ?

Pls. Advice .