Two-step process (entry Approval process) and update the invoice serial nu

[Tut]

@Mohammed_al_fahad

two-step process (entry Approval process)

This is already in ideas: Multi Level Authorization

@Mohammed_al_fahad

My question is how do I prevent the process of modifying the invoice number and date, while still being able to update the price or quantity?

This is not possible. If a user can edit invoices, they can edit any aspect of the invoice.