How much will i get back this year if i have 2 dependents and i did exemption accidentally on my w4 form?

Depends on how much income you have.  But if they didn’t take any withholding out of your pay you will probably end up owing.

I made only 5,053 its saying i wont pay anything but i eanna make sure im not gunn end up paying after .. now that it has happen to other people..

After the Standard Deduction and your exemptions you won’t owe any tax.  If you are Single you get a 6,350 Standard Deduction subtracted from you Income which will make your taxable income zero.