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Canceling Notas Fiscais 
You can use the Nota Fiscal (NF) Writer to cancel a nota fiscal that was created manually with the NF Writer.
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1. Run transaction J1B3N (display mode of NF Writer).
2. Specify the internal nota fiscal document number.
3. Choose Nota Fiscal ® Cancel.
The system creates a new nota fiscal with the type Cancel. In addition, it updates the administrative data of the original nota fiscal, setting the Canceled indicator.
