Hello, How can I create an alerting system in Asana? For example if someone has a task that is coming due in the next 24-48 hours can they be alerted as well as myself?
Happy Friday @Praveer_Mishra 
Thank you for reaching out!
Please have a look at this post I wrote a few weeks ago. You might find it useful.
There is also an existing thread requesting this feature: Set a reminder to tasks. If you haven’t yet, I would suggest you to upvote it.
I hope this helps! Please let me know if you have any follow-up question!