which of the following is a due diligence requirement for a tax preparer claiming the earned income tax credit (EITC)? Maintain a copy of all documents, including social security cards and birth certificates of all persons on the tax return; don't investigate and verify the accuracy of information a client provided to show eligiblity for EITC. It is their responsibility; If the information received from the taxpayer appears to be incorrect, inconsistent, or incomplete, make reasonable inquiries of the client to verify eligibility for the credit; Shred all copies of any worksheets and taxpayer documents that they relied on to compute the credit