Don, I'm not quite sure where it can be seen now in the Northern Hemisphere. It depends on your latitude. It might be more difficult now to see it at twilight when it is easiest to see, but it has been seen by some in daylight - with the sun carefully shielded out to prevent eye damage of course. This site, might be helpful.

We have only been able to get a twilight view here in the Southern Hemisphere since it rounded the sun a few days ago. The best view so far in my opinion was last night, because it was sufficiently high in the sky to still be visible as the sky darkened, but was still bright. In the next few days it will appear higher each time, which is good in terms of darkness, but it is also losing its brightness now and will become difficult to see even from here, as it heads back off into outer space in the next week or so. Because it has never been seen before, nobody is sure how long it will be before it comes back, but it certainly won't be in our lifetimes.

I located another viewing place closer to home today - Peace Park in Ashbury - but there were storms out west in the afternoon and the sky clouded over. There was no chance of seeing the comet, so I didn't go. Maybe tomorrow night...