CIS300 Return

CIS300 needs to be submitted to HMRC between the 6th and 19th of each month for the previous period. Any CIS300 submitted outside of this window will be rejected for that period.

Note: CIS300 is not automatically triggered by Nxsys. This will need to be triggered manually each month from your dashboard.

From your Dashboard, look to the CIS300 tile in the top centre of your screen and select the View All button as shown below.

This will then show a new window where you can select the Payment Company, Tax Year & Tax Week. This will filter the available submissions to the range you have selected. Once ready, you may click the Submit button in the top right of the window to send the CIS300 to HMRC

You may view the submission status by selecting the RTI menu on the left of your screen. This will then show a sub menu listing FPS, EPs and CIS300 tabs. Select CIS300 and you will see every submission for your company. Each submission will have a status of SUCCESS or FAILED. If status is SUCCESS there will be two icons available for that submission, an Eye icon allowing you to view the request and response xml files and a download icon where you can export the xml files to a txt document.

Note: If you wish to view the XML files that are sent and received by HMRC, then you will need to use a free Text editor like Notepad++ then you will be able to open the XML file and press CTRL+ALT+SHIFT+B which will format the XML into a readable text.

If the status is FAILED then there will be two additional icons, another download icon (in red this time) allowing you to download the errors to .CSV and a resubmit icon, which allows you to send that submission again once the errors have been resolved.

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