MSME payment after 45 days

Ask details for late issue of invoice. It's reasonable then account the same as per date of invoice.

Otherwise You can ask the same way as per Your query.

As per invoice act, it must be collected before 30 days. But you can get an invoice for an old date. It's basically illegal to not to give invoice and cognizable offence. Your idea cannot be correct because inventory audit must be adjusted when actual return is not recorded. However, invoice must be generated on that date only and can be given to you later on based on business relationship otherwise demand it.