At the end of an audio there is silence. Should I add a tag here?

Tag for silence is
Tags are not a hard requirement. This will not invalidate your result. If you would like to it is nice but not mandatory.

How precise should I be with tags in the Audio Correction task?

For validation 2 tags are important: not native, cut-off when the audio is finishing earlier than the sentence. The other tags will NOT invalidate the result

What is the best way to write the address information. Is ‘Road Xa Ya 54’ or “Road Xa Ya fiftyfour” or Road “X Y fiftyfour” okay?

What is the best way to write the address information. Is ‘Road Xa Ya 54’ or “Road Xa Ya fiftyfour” or Road “X Y fiftyfour” okay?

I just completed a number of tasks but there seems to be no more. Will there be more?

As long as you don’t see ‘No more tasks available’, you will see new tasks very soon, keep checking.
If you don’t see any task for one of the two jobs it means that they run out. In the meantime do the other job if available.