If you would like to stop the recurring invoices, open the Revenues/Expenses page from the Financials left-side menu, switch to the Recurring tab, and click on the transaction you want to stop from posting:
Click the "End" option at the top right corner. Then, check the box next to "Yes, I am sure!" and press the "Confirm" button. The system will no longer post invoices for this transaction in the future.
Note! There is no option to stop recurring rent invoices from the Recurring tab.
In order to stop the main rent recurring, you will want to either end a lease or edit it and disable the recurring invoicing. The following link might be useful: