Get your taxes done using TurboTax

@poncho_mike A couple things:

• Your broker does not see the K-1, or the details of the MLP, so has no idea what the correct cost basis is.  They should be reporting to the IRS with box B/E checked, basically saying that they're only reporting revenue because they don't know cost.  If they're doing that, there's no disconnect for the IRS to look at.  If they're reporting with code A/D though, then you may want to get them to correct that.
• Its worth figuring out, at a high level, what amount of income you should be paying tax on.  Then you can make sure TT is reporting correctly.  Blindly plugging numbers into TT and "hoping" its correct doesn't always give good results.
  • Overall, you pay tax on cash out (sale, distributions) - cash in.  You can go back and look at all the cash you invested (before it was a partnership as well as during the partnership phase), any distributions, and your current sale.
  • Once you know the total amount of income you should be paying tax on (for the whole period of ownership), and you back out the amount you've already reported on prior returns, you should have a pretty close idea of what you need to have show up on this return.
  • When you complete this return, your final income is going to show up primarily in 3 places:  your cap gain/loss (Sched D), any suspended losses that are released (Sched E), and any Ord Income (form 4797).  The may also see small amounts if any of the K-1 items were reported directly on Sched B/D and taxed.
• The instructions for entering the sale have been posted many times, so if you follow them and the income makes sense given the above, you're probably good.