Dear Taname Attakorn
Thank you for your question.
Regarding your question, please check below the some links which can help you to find what you are looking for:
1- The first link is regarding an answer of a similar question made in our community: How I can Extend F1515 App Statutory Reporting? Probably the answer of this question will answer your requirement.
2- Following you will find the page of our SAP Help Portal with all information regarding Statutory Reporting: SAP S/4HANA Cloud - Statutory Reporting where you can find information about extensibility.
3- In our community you can find blogs which can help you to find your answer. Please check one link as follows: Blog series on Define Statutory Reports : Introduction
4- Please also check the KBA 2748454 - SAP Document and Reporting Compliance - Statutory Reporting: Troubleshooting Guide