Amendment in gst reg. or multiple registration

This query is : Open

Querist : Anonymous

Querist : Anonymous (Querist)

28 July 2017 DEAR EXPERTS, Please help me with this...
Our client is having vat & service tax registrations. He has already migrated to GST using provisional id & password obtained from Mahavat website.
So my query is, will he be required to take another registration using provisional id & password obtained form aces.gov.in (service tax website), as he had not put in the required SAC code of the service provided by him while migrating from VAT to GST OR amendment is required
It is a proprietorship concern, so he has different business in Maharashtra for which he had obtained VAT & Service Tax Registrations, now will it be considered as business vertical and a separate registration is required for different business in Maharashtra ?