https://drive.google.com/file/d/1lM0KxBa2-_wzg1_r_2M8GbWrmlqoj10O/view
If you are using the multi-line feature of the text field then you will not be able to use return key as end of input.
You can have a “save” button before the text box which means on the top part or make the screen scrollable to slide it up and show the buttons
Thunkable has a component named “Dismiss Keyboard” in the device block.