Can you tell me what has been suggested that best dovetails into Powerstore3 to handle all of the taxes withheld of others, the expenses we incur, and the net income upon which we ourselves will be robbed, I mean "taxed"? It is a messy area that I bet has been smoothed out somewhat by Powerstore and by the back-and-forth between Support and Powerstore users. 
If you are asking "How does PowerStore handle taxes?" Here's the answer we provide as an FAQ on PowerStore's detail page:
"PowerStore allows you to specify the tax rate for the state in which you do business. However, any purchases made by customers outside of the state your business operates in, do not have to pay taxes - this is automatically accommodated for within PowerStore. Those who do not wish to charge a sales tax at all, or include this tax in the price of their products, can simply set the tax rate to 0."
You can see how you can configure this in PowerStore 3 by checking out the demo. powerstore-demo.com.
Some people want more custom tax rules, so PowerStore may not be the best choice unless they want to get in deep with custom coding. This hasn't really changed from PowerStore 2.
Any detail of the mechanisms that might interface with the database and if (and how) the relevant data can be accessed-and-pulled into our outside tool (e.g., Quicken, or something like that on our client system)?
PowerStore is not set up to interact with Quicken or any other 3rd party tool. This is also not something we currently support with our documentation or will support here in the forums. If you would like you can post this request in the wishlist forum.
[note: I have never been able to install Powerstore2 yet because the server was hanging us up...]
I would recommend that you look into why you weren't able to get PowerStore 2 to work before buying PowerStore 3.
I also advise you to be more direct with your questions on the forum in the future. The more specific, and less "wordy" you are, the easier it is for someone to know how they can best assist you.
