When we go outside he does his business most of the time if we use the command "go potty" he goes but, sometimes we bring him back inside and he goes instead
Another problem is maybe because we are often not home till 6 pm he is confused when and where to go and he shows no sign of when he has to go
Tim sure is cute (that's him in your profile pic, right?)!
Did you just get him, or has this been an ongoing problem? I am no expert but I would say, if you just got him, go ahead and give it some time, and be patient but vigilant. Follow what the training books say to a T every time you can - try to take him out often, praise vigorously when he goes outside, etc. (We, like django's parents, also use the bell-on-the-door and it works very well...) From what I hear - and our experience so far (which granted is less than a month) has been no exception - potty training is often the most difficult part about having a Hav. Also, what is his setup when you are not home? X-pen with a pee pad? In other words, does he have a consistent place to go potty during the day? Try experimenting with your indoor set up as well - if he doesn't seem to like the pee pads you can try the indoor turf thingie, or a doggie (not a kitty) litter box, try the pee spray stuff mentioned above - anything that can get him going in one spot inside when you are not home sounds like it would be progress (and in my experience, and from what I have read here on this forum, it will not confuse him when it's time to go outside). Oh and I am sure you are already doing this but it would remiss of me to not mention it - make sure that you are cleaning up his messes completely, along with some sort of cleanup spray (the opposite of the puppy pee spray lol), or vinegar works (and is what we use), wherever he goes in the house where he is not supposed to.
Finally, you said he is 10 months old - is he fixed? If not, could he be marking? -just a thought...
If, on the other hand, you have had him for a while and nothing seems to be working, I would suggest bringing in an experienced trainer or dog specialist who can help both you and Tim figure out why the house training isn't working, before you both get too frustrated.
Just my thoughts. Let us know how it goes!