here is the way to understand what is DSC

First of all You need to know that these are the Compulsory Items Required in Tax invoice in GST.

Compulsory Items Required in Tax invoice in GST

1	Name, Address,GSTIN No of Supplier
2	Unique Serial Number of Each Invoice in one or multiple series (Can have Dash -orSlash /.But it should be different series for each year
3	Date of Issue of Invoice
4	Name , Address ,GSTIN of Supplier If Registered
5	In Case of Unregistered Buyer, Name, Address, State, Place of Delivery is compulsorily required if Invoice Value before taxes is more than 50000
6	HSN Code of Goods
7	Description of Goods
8	Quantity as well as Quantity Code or Units
9	Total Value
10	Discount if any and Taxable Value (Total Value-Discount)
11	Rate of Tax (Separately show CGST, SGST, without IGST, UTGST, Cess if any)
12	Place of Supply (It is required For Interstate Sales)
13	Address for Delivery
14	Whether Tax is Payable Under Reverse Charge
15	Signature/Digital Signature of Authorized Signatory

Here is an example for GST Invoice.

DOWNLOAD HERE

(Excel, Word, PDF, JPEG in one zip file)

Also Check GST Invoice Format No. 1 Here

Also Check GST Invoice Format No. 2 Here

Also Check GST Invoice Format No. 3 Here

Also Check GST Invoice Format No. 4 Here

Also Check GST Invoice Format No. 5 Here

Also Check GST Invoice Format No. 6 Here

Also Check GST Invoice Format No. 7 Here

Also Check GST Invoice Format No. 8 Here

Also Check GST Invoice Format No. 9 Here

Also Check GST Invoice Format No. 10 Here

Also Check GST Invoice Format No. 11 Here

Also Check GST Invoice Format No. 12 Here

Also Check GST Invoice Format No. 13 Here

Also Check GST Invoice Format No. 14 Here

Also Check GST Invoice Format No. 15 Here

Also Check GST Invoice Format No. 16 Here

Also Check GST Invoice Format No. 17 Here

Also Check GST Invoice Format No. 18 Here

Also Check GST Invoice Format No. 19 Here

Also Check GST Invoice Format No. 20 Here