Hello there, Smitho99.
I'm here to share some information on what will happen when you delete a transaction.
When you delete the payment made from the supplier's account, the system is unable to match it to the CIS payment since there's no link transaction.
What we can do is, recreate the deleted item. Then, try to match it with the CIS transaction.
I've added this link to re-enter the transaction: Create a CIS transaction.
If you want to run CIS reports to check for the monthly statement, payments, and deductions, you can check this reference: How to run CIS reports in QuickBooks Online.
Also, if there's a need to un-file the CIS return, you can check this article: How to un-file a CIS return in QuickBooks Online.
There you have it, Smitho99. You're always welcome to post again whenever help is needed. The Community has your back!
