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Use this toolkit if you are currently under audit for EITC issues and received at least one of the following letters:
- CP75
- CP75A
- CP75D
- Letter 566-D
- Letter 566-E
- Letter 566-S
- Letter 525
- Letter 692
- Letter 3219
- Letter 555
If you did not receive one of these letters and have questions on how to proceed, call the number on your letter for help.