To make things faster and more convenient, you can create a 'sender' with your information details, so you don't have to write it every time.
Go to Menu -> Settings -> Senders and click the button in the upper right to create a new sender.
Click the button "+" to add a new sender.
In the new panel that will open, you must fill out the form and click 'Save' at the bottom right.
Get sender ID:
In the ID column Menu -> Settings -> Senders, you will see the ID number of the sender you created: