CIS Deductions suffered appear on the EPS because you are allowed to reduce your PAYE costs to HMRC by the value of any tax deduction that was automatically made from your invoices by a contractor.
You must first enable CIS Deductions under the Government tab of your company setup details.
Next, when you finalise a tax period you will have the opportunity to enter a value against CIS Deductions suffered. That’s it! You’re all done.