net them but turbotax does not handle excess business loss. you may need to file form 461 - see below
https://www.irs.gov/pub/irs-pdf/i461.pdf instructions
https://www.irs.gov/pub/irs-pdf/f461.pdf form
Who Must File
File Form 461 if you’re a noncorporate taxpayer (including a
trust subject to tax under section 511) and either (i) your net
losses from all of your trades or businesses are more than
$305,000 ($610,000 for taxpayers filing a joint return), or (ii)
you would report a loss of more than $152,500 on any one of
Form 461, lines 1 through 8.
