Adding a programmed function to Excel to calculate the business income tax An acceptable income tax account offers you to add a function programmed to Excel to calculate the work income tax and luxury amendments in May 2020, according to the Egyptian law, where the amendment of Law 91 for the year 2005 where the personal exemption was increased to 9000 pounds and the tax brackets were modified to be the first 15000 pounds exemption and the next 15000 subject At 2.5%, as we will see in the following table