unpaid gst

Sourav manik Banerjee (41 Points)

04 December 2018  
Sir my client has a business of JCB services and got registered on GST as composition taxpayer in FY 17-18

And filed nil gstr 4 from July'17 to Mar'18.

From April'18 he is registered as regular taxpayer, but doesn't file any gstr 3b till now.

In FY 17-18 he had tax approx. 8 lakhs rupees which is still unpaid.

Sir how can he pay tax, as i told you eariler he was in composition but now he is a regular tax payer.

Please tell me.