Default in Tally
In tally, there is no facility to generated QR code in sales invoices or any other voucher documents, which can be used for further automated purposes by other party.

Use of this TDL
Using this TDL, QR Code can be generated from tally sales invoices and any other vouchers, in pre-defined format on the face of the invoice formats.

This can be printed along with voucher and can be generated with PDF also.