@Syed9729, Can you be more clearer as in do you want access or do you want to grant access to someone?
For yourself - You will have to ask the current organization that you are working for to grant you access. If you are new to Anaplan you can sign-up for 3 months free workspace for your learning and trainings.
If you want to grant someone access make sure you yourself are workspace admin. Toggle to Users-> User -> Model role and grant the required access for the selected person.
Thank you for your inputs. I had signed-up but I didn't get the access. I am looking for 3 months free workspace access. Kindly help me with the steps to get it.