Help my cis return has been rejected

Hello there, @craigbeedecorati. I've come to help you ensure you'll be able to submit your return. 

HRMC might reject your CIS return due to any of the following:

• You have used the wrong login credentials. To verify it is correct, sign in to the HMRC website.
• Ensure you're using the right 10-digit Unique Taxpayer Reference (UTR) number.
• Double-check that you're using the correct PAYE Reference number.
• Check that your suppliers have the correct references and CIS setup. 
• Remove any special characters and additional spaces in the subcontractor/contractor name field. Only use letters A-Z and numbers 0-9.

You'll learn more about this by visiting this article: How to submit a CIS return in QuickBooks Online.

Then, you may want to browse the CIS guide to further help you in submitting the return.

Also, running CIS reports in QuickBooks Online is a breeze. With this, you'll be able to review your contractor monthly statement, payment and deduction statement, and summary of the CIS deductions withheld.

I'm always around the corner to further assist you in preparing your CIS return. Thanks for dropping by. Take care and have a great day ahead.