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Level 1
April 15, 2026
Question

Section 179 expense deduction disallowed keeps changing, and I can't find the error. Can someone walk me through it?

  • April 15, 2026
  • 2 replies
  • 5 views
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2 replies

Mike9241
Level 15
Level 15
April 15, 2026

it would change if business changes becuase its limited to business income. ir would also change if the tax basis of the 179 assey changed. 

Mike
Level 6
April 16, 2026

Sec 179 deduction cannot exceed your net taxable business income for the year, and special limits apply to vehicles.  So if you're business income keeps changing due to income and/or expenses that you are adding on your return, this may be the reason why your disallowed amount keeps changing.