Did you already get the refund from from your original tax return or pay the tax due? The Amended return assumes you did. In fact you should not amend until the first return is fully processed.
Then the amended return is only for the difference you get back or owe. I think the cover sheet shows what the original return WOULD have been if you did it right the first time.
Go by the actual 1040X. Line 18 should be your original refund amount and line 22 should be your additional refund. If you paid on your original return it will be on line 16. If there is an amount owed with the amendment, it will be on line 20.
