Reference from Data Entry Vietnam on how to declare adjustment invoices in Vietnam as per current regulations

• Replaced Invoices
– If Invoice F0 is replaced by Invoice F1 in the same period: declare F0 = 0
– If Invoice F0 is replaced by Invoice F1 in a different period: declare the invoice number and invoice date of F0, all other information is taken from F1

• Adjusted Invoices
– If Invoice F0 is adjusted by Invoice F1 in the same period: declare both F0 & F1
– If Invoice F0 is adjusted by Invoice F1 in a different period: declare the invoice number and invoice date of F0, the rest of the information is adjusted according to F1

• Invoices replaced/adjusted due to errors
– If Invoice F1 replaces/adjusts Invoice F0 in the same period: keep F1 as is
– If Invoice F1 replaces/adjusts Invoice F0 from a previous period: declare F1 = 0

By Data Entry Vietnam