Hi Mriganka
I am assuming you need help for the newer portal version?
So Check
Step 1 select knowledge base in dropdown enter your problem statement in the box next to it if the issue you are looking for does not have an existing solution then click on button Contact SAP support
Step 2 " Fill in the system info which will be available as a dropdown and is pretty intuitive to fill and then click on Submit
Regards
Vinita