Tap on the plus button, at the bottom of the Dashboard screen.
Alternatively, access the Draft claims from the side menu. From here you can add a claim line to an existing draft claim, by tapping on it, or use the plus button from this screen to create a new claim.
To create a new claim, you will first need to enter a description of your claim in the purpose of claim field. Once you have done that, you can then tap on Add a new line to start creating claim lines.