I can't add tab in my stash

[Jazz-2357]

Read Perusoe’s answer in this thread:

Possible Stash available in Game

Presently, I having a total of 11 bank slot. I like to know whats the Max numbers one can get in game and how to get them. 1 tab x 5 bank slot - new season (Purchase from NPC) 1 tab x 4 bank slot - (same as above) 1 extra bank slot - When completed some Season Journal 1 extra bank slot - when completed Full seaon Journal Thanks and Regards,