Thank you for your question
My name is Clare
I shall do my best to help you but I need some further information first.
How old is your daughter and how much are the arrears
How did the arrears arise?
Have you asked for a copy of your CSA file and a breakdown of the arrears
There are clearly substantial arrears.
The CSA are allowed to set a schedule that arranges for full payment within two years, but they can only take 40% of your net income - as it appears they intend to do.
You will need to write and ask for a full break down of the arrears so that you can consider other methods of payment.
You will also need to apply for a full copy of your file under the Freedom of Information Act (it will cost £10)
The onus is on you to prove that their calculations are wrong
You may find this group helpful
Please ask if you need further details