Partnership Final K1 complete disposition or Disposition not via Sale

[themadanimator]

I have a Final K-1 for a partnership that went bankrupt and closed. I was a Limited Partner with passive losses. I my initial investment was $100k. I never received any money or otherwise and have been carry passive losses forward for 4 years. Now that the company is closed, I don't know how to account for the losses. TT is asking for sale date but the company was in bankruptcy and wasn't sold, just folded.

[LudwigVan_fan]

I would use as the "sale date", the date when you reasonably knew you wouldn't get any money back.  If that was the date of bankruptcy, when bankruptcy ended, or the partnership folded.

Sales price would be zero.  Suspended losses would deductible in the year of disposition in full (up to the amount of at risk)

As to the remaining amount of your investment, that would be a capital loss.

Some further reading

https://www.irs.gov/pub/irs-pdf/p925.pdf