Some information which needs to note during input through 2 modules:
Invoice date: If the company has a postponement date, you must complete this field as desired. For VIETTEL suppliers, customers can postpone 25 days from the current date, the principle of invoice date must still ensure continuity
For example, today 1st July, customers can post 25 days from 1 st July, and customers choose 15th June to Export, customers will be issued on condition that they have never released an invoice after 15th June
Invoice number: Create automatically according to the symbol that denominator.