Deductions & credits

Man friend of the court needs a revamp. I am a single father to two but my eldest lives with his mom. (Yes that's 3 kids) and I help her with child support. I pay $300 monthly  but I get paid on Tuesdays. This $600 was because I get charged the first but do not pay until payday so late fees accumulated throughout the year. 

$50 a month * 12 = $600

Now if im paying through it coming directly out of my salary I shouldn't be charged these fees. Now if it does take six months it will be to late for vacation.