I also charge tax, however I have never had any problem, the thing that you guys are missing is that tax does not have to do anything with eBay, you have to set up your tax with Paypal and when you do, no matter if you send the invoice or not, Paypal will charge all the costumers from the countries that you specified when you set up the taxes on Paypal. When you go to your paypal, search for tax and you will find the necessary link to set it up, once you do, you will never going to miss anything.
Regards,
Alireza
I wish it were that simple! And yes, if ebay has a checkout system set up, it DOES have a lot to do with ebay!
Anyhow, I've been here long enough that I KNOW I have to set up paypal -- I've set up the taxes on paypal long ago, and every time there's a problem I go back and make sure that everything is still set up correctly (usually it is but sometimes the ubiquitous glitch has set in!), but when my buyers pay before I invoice them, they don't get charged the tax! The ONLY time I have a problem is when the buyer pays before I've had a chance to send a checkout invoice, (and checkout is definitely ebay!) so I have to believe ebay is sending paypal the info.
If we could send checkout invoices as soon as each item is over, there might not be a problem but we have no way of knowing if a bidder will be successful on other items as well!