What is the form to use to update financial / income information for a child support calculation? Seems like the full form is overkill.
PS My spouse is self employed so the form should cover that somehow.
You're absolutely right. The full form is overkill and it is that way for a reason. There are those that want to disenfranchise their former spouse, children and the court system by withholding pertinent information that would help the courts to make the proper ruling. So it might be tedious and painstakingly ridiculous to fill out, however unless it is filled out in its entirety the courts will not look at your motion to modify child support.
There are three possible forms that you would need to perform the calculations. Which one pertains to you would depend on your custody - if you had shared part-time or supervised custody. I have included a link that will take you right to all the forms and worksheets you will need to do this. There are a lot. Good luck...