If you are want to generate GSTR-1 return through the government template then follow these steps:
Step 1: Visit Gst.gov.in and click on the download option.
Step 2: Choose the Offline Tool tab, select Return Offline Tools, and download the GSTR-1 template.
Step 3: After download, unzip the file
Step 4: Now, Go to display and then click on GST reports tab
Step 5: Afterward select the GST return option then click on GSTR 1 Ereturn option
Step 6: Next , Choose As per Govt. Templated option to generate the report
Step 7: Finally, specify the date range, check the required options, and provide the location for both the eReturn template file path and the eReturn file path at the bottom of the window.
Step 8: Press on ok tab and then check the possible errors related to transaction , HSN/SAC code and the document summary.
Step 9: After error rectification, click on proceed with Govt. teplate.
Note - Return generation through Government templates will take some time due to validations embedded in the Government template.