Mechanism for calculating value-added tax and customs in electronic commerce Instructions for submitting the research assignment  Justify all provided text.  All references that were used in preparing the research must be clarified as they are prepared in the APA method.  It is strictly forbidden to use information from the Wikipedia site, as only the official sources, books and articles are authorized to use. Please be aware that all the answers provided will be checked using the plagiarism examination tool, as the permissible similarity is only the similarity in terms and general knowledge. Any truncation or amendment of paragraphs with the aim of concealing the theft will be considered plagiarism, and the presence of plagiarism in the answer will greatly affect the student's score, so please write in your own language.