what do we mean by igst,cgst and sgst

Diear sir/madam

I am a final year Mcom student doing a project on GST titled " Analysis of GST in relation to dfferent sectors of Indian Economy" .I have got information regarding other sectors but kindly provide me information about possible impact of GST on agricultural products . My query is Possible impact of GST on agricultural products. Please provide me information as it is very helpful.

Thanks and Regards,
Sumanth kashyap R

This is in reference to Application for Enrolment of Existing Taxpayer submitted at GST portal. It is observed that details of following PAN's are not matched with CBDT database. Kindly fill the details as per PAN details and resubmit the Form. Details of the PAN's are as under:
1. AHQPM0203Q(mismatched PAN)

In view of the above discrepancies, Form is considered as incomplete. Please resubmit the Form with correct details.
This message is sent to you on your registered email id and email id of your primary Authorized Signatory.

Best Regards,

Government of Karnataka
Commercial Taxes Department

I want to get my head office registered as an INPUT SERVICE DISTRIBUTOR (ISD).
I am facing a query whether an ISD under GST regime can distribute credits only within a state or all over India.
If an ISD can distribute credit all over india, i will be applying for one ISD registration under FORM GST REG-01.

Is it mandatory DSC for GST registration? Can I use Aadhar card Number for GST registration?

pls suggest me what is the code of civil contactor in gst (hsn code) ???

As a service provider I am registered under service tax as business consultant. I stopped providing services since last 2 years but I am filing nil returns regularly.

In future also I am not interested in providing any type of services.

So considering the above position is it mandatory to apply for provisional registration under the GST even if no taxable services are being provided since last 2 years?

one of my clients want to close his business in the month of March 2017. Is it necessary for him to migrate to gst? please clarify.

can I change phone number or email address after enrollment on gst ?

Can I register directly i gst i.e without registering for vat, service tax etc.?