you can get it from http://gst.gov.in website and see the Download tab on right side top of window
After clicking on it you will prompt to download a zip file
unzip it and see the files under it.
click on GST Offline Tool application to run the setup and black screen will appear
may be you get the below error
C:GST Offline Tool>for /F "tokens=3" %a in ('reg query "HKLMSoftwareMicrosoftInternet Explorer" /v svcVersion') do (for /F "tokens=1 delims=." %b in ("%a")
if %b LSS 10 (echo You are running less than IE 10;
start "" http://localhost:3010) if %b GEQ 10 (
echo You are running Internet explorer 10 or higher. start winstart-browser.vbs
ERROR: The system was unable to find the specified registry key or value.
Now you facing the problem about gst offline tool its not working and black window appear and disapear frequently.
GST Goods and Services Offline Tool Utility Solutions :
open your chrome or mozilla browser and write http://localhost:3010 and open it your GST offline tool now work and open the goods and service tax offline tool utility.