We a Canadian company using Quickbooks Enterprise, would like to operate in the US

You should use QB Desktop US version (i.e Pro, Premier, Enterprise) for tax and/or payroll requirement. You can purchase the new license through select partner to get perpetual discounts for renewals.

Do you know any good Canadian partners to purchase discounted licenses through? Our current enterprise is through Quickbooks directly

@Omaa 

Contact me in private and we can introduce to a select partner in the US.

Hey there, Omaa.

Thanks for turning to the QuickBooks Community for support. I can understand the need to shop around for the best buy. However, QuickBooks Desktop products are only available directly through Intuit. Please don't hesitate to reach out to our QuickBooks Desktop team.  They'll be able to work with you directly and provide the best fit for your business needs.

If you have any other questions, feel free to reach back out.