there is no form 179 the 179 deduction is on form 4562.  but for an amount to be allowed, the business must have a profit before the deduction and businss use must be more than 50% .  the 179 deduction can't exceed this profit.  look at the form line 12

to get the deduction you must properly enter the auto info for schedule C.  there is a separate worksheet for auto's .  

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