– Open the job you want to deduct CIS from
– Create a CIS suffered item by typing ‘CIS’ in Item Code and CIS Suffered in Item Name
– Add -1 in quantity
– Add the amount you want to remove from the invoice
– Set Tax rate to No VAT
Use this online calculator from V.G. Woodhouse & Co. to work out the deductible CIS
Please note: Check this with your accountant to make sure they’re happy with this method. I take no responsibility for your accounts or CIS process.