the 'tax paid" is "Withholdings".. it is part of Line 28 / refundable credits.
Comparing Withholdings on your W-2 to the Refund is sorta "apples and oranges".
Take the tax liability on Line 12 subtract any non-refundable credits (line 19) and any refundable credits (line 28, which includes the Withholdings). If the result is positive, there is an Amount Due (line 29). If the result is negative, there is a refund (line 34).
it's really that simple!
