Transitional provisions :
Sections 139 to 142 of CGST Act provide for transitional provisions for shifting from existing tax system to GST.
Existing registered persons will be given provisional registration under GST. Once they submit required details, the registration will be final. The procedure for granting provisional GST registration numbers has already commenced.
Unavailed Cenvat credit and Vat credit will be allowed to be carried forward.
Even excise duty and Vat paid on stock will be allowed to be carried forward, if the goods were earlier exempt but have become taxable under GST.
If there is price revision, supplementary invoice, debit note or credit note can be issued under GST Act.