I understand that the deadline is midnight on Thursday.
When you say that you have the figures to hand, do you mean just the rental account figures or everything you will need to complete form 11.
I suggest that you download a paper form 11 and complete it, once you have torn the house apart to find your wife's pps number or whatever other detail that just doesn't want to come to light, actually completing the form 11 on ROS should take less than an hour.