In the past, low-income taxpayers and their paid tax preparers have not developed documentation to support EIC claims as part of the tax return preparation. If the tax return is selected for audit, the IRS will demand documentation. It can be more difficult to obtain such documentation when the audit occurs. Taxpayers throw out or lose documentation. Agencies or businesses that may have documentation may close, have a difficult time locating older records, or be unwilling to cooperate. Witnesses may move. Therefore, if you have the opportunity to prepare the return, you should advise the taxpayer to obtain and maintain documentation of residency and support for that tax year.