Delayed refunds for returns claiming certain credits. Due to changes in the law, the IRS can't issue refunds before February 15, 2017, for returns that claim the earned income credit or the additional child tax credit. This delay applies to the entire refund, not just the portion associated with these credits. Although the IRS will begin releasing refunds for returns that claim these credits on February 15, because of the time it generally takes banking or financial systems to process deposits, it is unlikely that your refund will arrive in your bank account or on a debit card before the week of February 27 (assuming your return has no processing issues and you elect direct deposit).
Child tax credit and additional child tax credit may be disallowed. If you take the child tax credit or the additional child tax credit even though you aren’t eligible, you may not be able to take these credits for up to 10 years.
American opportunity credit may be disallowed. If you take the American opportunity credit even though you aren’t eligible, you may not be able to take this credit for up to 10 years.