You should contact a tax attorney for assistance. This can be a difficult issue to resolve.
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From the information you have provided, it appears you qualify for the adoption credit, and that your adopted daughter qualifies as a dependent. Possibly you did not provide all the necessary documents to the IRS for them to make a correct determination, or the IRS made a mistake in their determination, or perhaps the actual facts according to the documentation are different from what you believe they mean. You probably ought to consult with a tax attorney who can review your facts and your documentation and help you to get a correct result.
This information is provided for educational purposes only, and is not to be relied upon as legal advice. You should consult with an attorney with full disclosure of all facts and opportunity to consider all or alternative options.