If you have made any changes to the invoices in BUSY after uploading the JSON file on portal, so those changes wont be reflected on your portal,you need to follow these steps:
First, you need to reset the uploaded data for GSTR-1 on the GST portal,to reset your data you can Log in to the GST portal (https://www.gst.gov.in/).
1.Go to the Services tab and select Returns from the drop-down menu.
2.Click on Returns Dashboard.
3.Select the Financial Year and Return Filing Period monthly or quarterly,
4.Choose the GSTR-1 form.
5.You will see a list of sections for your GSTR-1 return. Click on the respective section that you want to reset.
6.You should find an option to Reset the data for that section. Click on it to reset the data.After that,make changes to the invoices in your BUSY Accounitng software,and then create the JSON file again,Afterward,please re-upload the JSON file to the portal.