One more note. A NOL allows for carryback to previous years which requires amending your previous tax returns. Many/most don't want to do that. If you are one of them that don't want to carryback your loss you "must" include a statement in your 2016 tax return stating you elect to forego the carryback period for this NOL. This form is already prepared and available in your TurboTax. You just must make sure it's included in your return. Please review IRS Pub. 536 and use form 1045, schedule A to figure your NOL carryover.
