Service Tax Dues

NAVEEN KUMAR SURE (CA FINAL AUDIT EXECUTIVE)   (88 Points)

17 August 2017  
Hi, 
one of our client is started business in the month of May 2017 not registered under service tax but tax is collected, this is due to service tax payable for individuals on quarterly basis. 
now he is registered under gst due to non availability of registration under service tax. 
my query is whether there is any option available for discharging service tax dues upto 30th June in GST. if yes let me know the procedure & notifications if any.?
else let me know any other options available.