Group 1 - The article discusses the process of withholding and paying individual income tax for employees, emphasizing the importance of compliance with national regulations [11][12][8] - It explains that employers are responsible for withholding and remitting personal income tax on behalf of their employees, which is a mandatory requirement [8][11] - The article provides guidance on how to use the Natural Person Electronic Tax Bureau's web portal for tax declaration, detailing the steps to complete the income tax submission [15][13] Group 2 - The article includes a reminder that the platform providing this information is unofficial and serves as a learning resource, encouraging readers to share experiences and knowledge [25] - It references previous issues of a guide related to individual business operations, covering topics such as invoice errors and tax payment procedures [24]