How do I fill out the “multiple jobs” section of my W2 when I work as a substitute teacher for multiple districts

[Htate]

i work as a substitute teacher currently for 2 districts in WA state. For my w2, I just checked the box that says “check for 2 jobs”… but now I want to work in a 3rd school district so I have to do the calculations the w2 says. Since I get paid and have to fill out a separate w2 per district, How do I fill it out if I don’t know exactly how much I’m going to make this year substituting? I don’t know which district I’ll earn more in because I just pick up jobs that pop up through the week. Thank you. 

[OpeA1]

I think you mean the W-4 and not the W-2. The W-4 is for withholding and the W-2 is a tax statement provided to you by your employer at year-end.

If it is the W-4, do fill the section (Step 2) that states you have multiple jobs. Note that you can also put an amount in Step 4(c) and they will with hold this amount in addition to what is calculated for withholding.