how do i get more money on my paycheck

Hello !

How do i get more money back on my paycheck?

last year tax withheld on my account was around 18,000 and return is around 8,000. 

Circumstances have changed for me and i need to see more money on my paycheck so be able to manage expenses.

pls advise on how i can get more back on my paycheck.

Thank you.