Dear Mumies, I wonder how many months after birth you can back to work? Is it ok 2 months?

for my first child when i was still working outside, i went back when my son is 2 months old. As i was in the retail line, and it was the december period, so i went back to grab more sales. For my second child, i was working with my inlaws, so i went back to work right after my confinement.