Granted, I'm not an account nor a tax lawyer, but I have a thought or more of a question.
Are there loopholes and business practices that can be taken advantage of for taxing and shipping purchases? Such as using a local company as a 3rd party to handle the shipping of a product you sell?
Example: Instead of having to track sales tax for EVERY state and locality, you use a 3rd party as your shipper. Your business is located in AZ. John Smith in CA buys your product but you actually hand the item off to your shipper who is located in your same town or at least same state. They handle the shipping of the item to CA. Is there a way using a method like that to avoid having to collect sales tax from every customer from the state they reside in?
No, the shipper is just acting as your agent, you made the sale you are responsible for sales tax.
And unless you are selling from your own web site, the marketplaces are going to report your sales by state now.