If your sales invoice has had CIS deducted by your customer, you can record this in the sales section by following the steps below:

1) Head to the Sales section

2) Find the invoice that you would like to record the CIS deduction against

3) For this invoice, under the CIS Suffered column, click on '0.00'

4) Enter the date that the date and amount of the CIS suffered, i.e. the date that payment was made for the sales invoice

5) Click 'SAVE'

You'll now see that the amount in the Outstanding column for the sales invoice has been reduced by the CIS entry.