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).
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The application will automatically default the month and year of the return based on today’s date.