Hi @HeatherSHarmon , the notice CP12 is related a change the IRS made to correct a miscalculation on your tax return. You may need to mail a copy of the letter in requesting an explanation as to what was corrected on your return. I am attaching a link to help you with this.
https://ttlc.intuit.com/turbotax-support/en-us/help-article/internal-revenue-service/got-cp12-notice...
Hope this helps!
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