I want to ensure you're able to submit your CIS return directly from QuickBooks, @sarah-cain-adfin.

To start, let's perform some troubleshooting steps to fix this. There are times that the browser is full of frequently accessed page resources, which causes some errors or unusual responses. Let's start accessing your account using a different or a private browser. You can use either of these shortcut keys:

• Google Chrome: Ctrl + Shift + N
• Mozilla Firefox: Ctrl + Shift + P
• Microsoft Edge: Ctrl + Shift + P
• Safari: Command + Shift + N

Then, submit your CIS. Once you have successfully done the process, go back to your regular browser and clear its cache. This is done to speed up the process next time you do a transaction in QuickBooks Online. Also, an alternative way is to use other compatible browsers.

I've also attached some articles you can refer to for your future guidance and detailed steps in managing your CIS:

• CIS guide in QuickBooks Online
• How to unfile a CIS return in QuickBooks Online

Fill me in if you have other questions about submitting a CIS return. I'll be around to help you again. Keep safe and have a good one.

I am having the same problem. Second month running. Worked ok before then. Not finding quickbooks support much help 

Hi there, @Frances w.

Please know this isn’t the kind of experience we want you to have. It seems that you've posted twice with the same concern here in the Community. 

My colleague already shared some information you’ll have to consider when submitting CIS returns. She also included the right support that can help you with your tax concerns. You can refer to this link: https://quickbooks.intuit.com/learn-support/en-uk/transactions/re-i-keep-having-problems-submitting-...

If you have any other questions or clarifications within QuickBooks, leave a comment below. We're always here to help you. Take care.