Working across borders

Does anyone here work in Canada and have clients in the United States or vice versa? Are there any legal issues in doing this?

If you have value added tax (VAT or GST) in your country you may be eligible to claim them back from government when export.

I’m in Minnesota. I have worked for several clients in Canada. There have been no legal issues. However, I imagine it depends on what type of product or service you provide.

I want to start doing programming contracts in .Net

I get offered contracts locally from time-to-time, but they are really just temporary work positions, and I’d like to work from home.