Step::1 Log into your WHMCS.
Step::2 From the menu at the top, navigate to Find, Utilities and click on To-Do List option.
Step::3 From the WHMCS To-Do List page, select the Add Item tab.
Step::4 From the new form made visible, fill out the information as it should pertain to the new task you are looking to create.
Step::5 When you have finished filling out the information, you can proceed by clicking on the Add To-Do Item button.
That's It !Check out the video tutorial to learn the procedure in detail. You may read the blog as well.