Does QB support E-invoicing which is applicable under GST law

Yes, @rashmi-vikram. Here's everything you need to know about the GST E-invoicing in QuickBooks Online.

In the last 37th GST Council Meeting, GST Council finalized and supported the E-Invoicing Standard. The goods and services tax network (GSTN) rolled out this standard format for all the suppliers filed under GST. This is to guarantee that the e-invoices created by one software can be read by e-invoice made by others. For more details, please visit the E-Invoice Format GST page. 

Also, to know more about the implementation of E-Invoicing in GST, head to the E-Invoicing in GST page at this link. 

Then, for your invoices to be GST compliant, you'll need to include particular details, like the company’s name, address, and GSTIN. For more info, open this article: Customise Your Invoices to Be GST-Compliant.

Keep me posted if you have any other concerns about E-invoicing under GST law in QBO. I'm always here to help. Have a great day ahead.