Thank you for your question
My name is Clare and I shall do my best to help you.
I understand that at this stage you simply want some help in filling in the Acknowledgement of Service form that you have received with the Petition
The first thing to say is that unless your daughter is at University then your ex would still have to pay Child Maintenance for her whether or not you signed the paperwork and you could apply to the CSA for an assessment
Equally you can apply to the Court for the financial issue stop be dealt with at any time whether or not you say "yes" to question 6 - but you will need to be sure to issue the application before the Decree Absolute is granted. If you do say yes to question 6 then the Decree Absolute would not be granted until the finances have been dealt with.
So far as the tick boxes at Section 10 are concerned there is no problem UNLESS he has ticked one of the books at section 10 2 - which is about costs.
Essentially the choice is your for question 6 - but there is no reason NOT to say No provided you are willing issue the financial application promptly if mediation fails
I hope that this is of assistance - please ask if you need further details