Can a business registered/incorporated in one province do business in another province?

I've been getting conflicting advice about this, and figure if there's a spot that would know the answer one way or the other, it's onstartups.com

In a nutshell I'm trying to find out if I have to register in every province that I wish to acquire business in. For example, if I'm registered in PEI, but wanted to acquire some contracts from customers or companies in Nova Scotia, would I have to register in both provinces to legally acquire business in either jurisdiction? If so, would it be easier to just register as a federal incorporation and be done with it?

Short answer: no, no you don't have to register elsewhere.

Feel free to get your customers anywhere.

You will, however, need to think about which taxes you will have to collect on from customers in other provinces. There is a tonne of information available on it, but you might want to connect with your local enterprise centre. Here is a good read: http://sbinfocanada.about.com/od/pst/a/PSTecommerce.htm Also, trying giving XEDC a call - I realize it's NS, not PEI, but they're just across the straight and have a good team there. http://xedc.ca/