Firstly there is information, like your address, which can be kept private. If you get forms they will often say that 'this page will be sent to the other parent' but the addresses aren't on there. I know because I haven't told Ashtons father our address and I made sure it wouldn't be passed on.

Also if they go on last years taxable income, and the current is significantly lower, you can apply for change of assessment. You will have to fill out some forms and prove that your income is lower, and they will change it. And vice versa (you think the other party should be paying more) etc. Again I have just done this as CS for Ash was being calculated at a $18,000 gross wage when he is now earning a lot more.They have changed it to reflect his current income.