We are manufacturing laminated textile under chapter 59.

We are manufacturing laminated textile under chapter 59. Previously, our product was exempted under Notification no. 30/2004-CE. But in States we were paying 4% VAT. Also we are doing job work of textile lamination for some customers. Our invoice value is sum total of raw material used for job work, labour charges and profit. Under GST regime:
(a) Whether we will get input credit on material?
(b) How can we make invoice, which rate, or we have to make two different invoice, one for material used for lamination and other for service charges?

(a) Yes. You would be eligible for credit of tax paid on material used for job work.
(b) No. You are not required to raise two different invoices. You would be raising one invoice similar one to what you have been doing till now and GST at the applicable rate will be charged on the invoice value. You can pay your tax liability by using Input Tax Credit (ITC). However, invoice should carry all the details as required by the CGST Act, 2017 and the CGST Rules.