I have a customer who has always been marked as CIS. The customer is still marked as CIS but quickbooks isn’t automatically deducting the CIS like it used too

I just got some details to make sure your CIS deductions will correctly reflect in QuickBooks, @souththames.

When you enable QBO's Construction Industry Scheme (CIS) feature, the system will compute your deductions, log your withheld or suffered amounts, and generate the appropriate HMRC reports

I recommend reading this article: CIS in QuickBooks Online to know more about the CIS process of withholding tax and national insurance contributions. It also includes topics like making CIS transactions and using QBO reports.

Additionally, I'm adding these helpful resources you can review regarding how you can manage CIS transactions in QBO:

• Already using CIS in QuickBooks?
• Record Deductions Suffered under CIS in QuickBooks Online

I'm always available to assist further if you have additional concerns with the CIS scheme or  QuickBooks in general. Just leave your comment below. Have a good one and stay safe!