In order to end/delete a recurring invoice, 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:
By clicking the "End" button, all future transactions in these series will not be posted and all published transactions will remain. Click on the checkmark and confirm your choice:
Click the Actions button to open the available options. By choosing the "Delete" option, the recurring posting will stop and all the published transactions in this series will be deleted. Click on the checkmark and confirm your choice:
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: