You cannot revise the GSTR-4 after filing. However, you will get an option to amend the data under the previous tax period head in the GSTR-4. It is advised to be vigilant while filing the GSTR-4 and double-check it before uploading it. Once uploaded, it cannot be fully amended or revised at all. You can only amend limited entries in the data of the GSTR-4 Form.