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taxmap/instr/i1040gi-020.htm#en_us_publink_24811vd0e50143

Identity Protection PIN(p78)

rule
For 2012, if you received an IRS notice providing you with an Identity Protection Personal Identification Number (IP PIN), enter it in the IP PIN spaces provided below your daytime phone number. You must enter your IP PIN exactly as it is shown on the Notice CP01A you received. If you did not receive a notice containing an IP PIN, leave these spaces blank.
caution
New IP PINs are issued every year. An IP PIN should be used only for the tax year it was issued. IP PINs for 2012 tax returns generally were sent in December 2012.
If you are filing a joint return and both taxpayers receive an IP PIN, only the taxpayer whose social security number (SSN) appears first on the tax return should enter his or her IP PIN.
If you received an IP PIN but misplaced it, call 1-800-908-4490, extension 245. If you need more information or answers to frequently asked questions on how to use the IP PIN, go to www.irs.gov/Individuals/Understanding-Your-CP01A-Notice.
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