#1 WHAT IS MY FILING STATUS

#2 WHO CAN I CLAIM AS A DEPENDENT?

The above links take you to the IRS site where they have a very useful interactive Q/A service.
Click the "BEGIN" link at the bottom of the IRS page to start the Q/A.

Decision tree regarding dependent

Above will take you to IRS pub 4012 - - see page 59
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How long to keep records

Be ready with info before calling the IRS