@turtax_live TT will track this for you and carry-over anything suspended from prior years. But in general, at-risk losses don't become relevant until your basis has dropped to 0. At that point, MLP accounting gets far more complicated, you can no longer check the "All my investment is at-risk" box, and any further passive losses are suspended in this separate at-risk category (with its own handling and rules).
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**Note also, I'm not a Tax Preparer/CPA. Just a volunteer, seasoned, TurboTax user.
Use any advice accordingly!