Do you apply for a refund of sales taxes?

[Marc D.]

I'm paying sales taxes for my supplies when I flip a house. The IRS considers my house as inventory since I am a dealer. If this is inventory, I shouldn't have to pay state sales taxes for the supplies -- but I don't charge my end-buyers sales taxes, so I will never collect nor owe sales taxes. So do I sign up with the state as a merchant and submit refund returns for all of the sales taxes I put into my properties? Or something different?

I am in Denver CO, if it matters.