Filing Monthly Returns - Introduction
To file a monthly return select ‘File CIS300’ from the navigation bar on the left-hand side of the screen then select ‘Monthly Return’.
The introduction screen enables you to select the month that you want to submit a monthly return for. You can submit returns up to three months in advance, and also in arrears (as far back as April 2007).
The application will automatically default the month and year of the return based on today’s date.