What is compliance with Section 139A(5)(c) of the Income Tax Act

 it is hereby declared that any person, who has been allotted a permanent account number under any clause other than clause (iv) of sub-section (1), shall not be required to obtain another permanent account number and the permanent account number already allotted to him shall be deemed to be .

In compliance with Section 139A(5)(c) of the Income Tax act all the sellers raising an invoice of INRs 2,00,000/- or more should display the 10-digit PAN number (of both vendor as well as a customer) on each such invoice as a separate field. This is with effect from 1st October 2021.

In addition to GST number, you have to separately display your as well as your customer's PAN number. 

Is  there any Notification related to this?

In compliance with  Section 139A(5)(c) of the Income Tax act all the sellers raising  an invoice of INRs 2,00,000/- or more should display the 10 digit PAN number (of both vendor as well as a customer)  on each such  invoice as a separate field.

This is with effect from 1st October 2021

In other words, in addition to GST number, you have to separately display your as well as your customers PAN number.

Dear Sir, What is the objective of this new rule?

There is no such circular or new clause addition . Quoting of PAN has already been mentioned in Rule 11UB.