Was testing edit orders 2 and came across the following problem:
The standard invoice shows the sub-total and shipping inc. tax. As soon as you edit the order, edit order shows you the sub-total and shipping ex tax. With sub-total that is no problem, because as you can see it's the right amount (0,85). So it calculates tax over 0,85EUR. But with shipping it caculates tax over the 1,00EUR. Instead it should calculate it over 0.84EUR. Because the 1,00EUR is already inc tax.
If, when editing, you leave the Shipping Tax Rate (Not Stored in DB) at 0%, the total is correct but the tax is incorrect.
I've attached an example.
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