That the Supplier form be given a specific business identifier field as occurs with the Customer form.
Tax authorities are moving towards the formal reporting of both the gross taxable values and the individual transactions made by registered taxpayers. In India, the above dual reporting is already mandatory.
These individual transactions made by registered taxpayers need to be 1) connected to a business identifier and 2) have that business identifier included in the tax reports, per invoice.
Inclusion of the business identifier in the reports would create the documentary support required for the tax filing.