You should only report the personal portion of the 1099 on the personal section in TurboTax and the business portion on your schedule C.
Alternatively
You could report the business asset as "converted to personal use" and then sold. This way the 1099-K can be reported on the personal section
HOWEVER
Either way, as a business asset, you should have taken depreciation and/or a Section 179 deduction and that needs to be included in the Capital Gains and/or Depreciation Recapture income.
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