I think it is Erechtites hieracifolia but without seeing the lower foliage or having any idea of habit that is an informed guess. For future reference it helps a lot with identification if we can see the plant in situ as well as having close ups.

Yes, that is what the plant is. Thank you very much floral for the identification. For such a tall and vigorous plant, it seems like it should be more than an annual. It must grow very fast to reach that height in one year. Sorry that this picture did not upload very sharp.