Thank you for your question, and thanks for requesting me directly. How are you doing today?
I realize that you have a question about whether you should send your refund check back to the IRS or not.
Your 1040X should have factored in the refund that you received, and your amount due should have included a refund of any refund you would have gotten from the original return.
So, you should simply deposit the check.
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The refund is not the same amount as on 1040, there is a discrepance.
You will need to contact 1-800-829-1040 and speak with a representative with the IRS
This is the same thing I would do for my client (call the IRS)