This may be too late in the day for you. Sorry, I only just saw your message.
Feel free to look into this 3rd party software in combination with an accounting software such as Quickbooks of Xero. It acts as a bridge, extracting the exact tax info from your sales account, preparing the data into a readable format for the accounting software, linking your selling account with their accounting software.
Check it out for yourself - hopefully this can help you.