@maynard7 Nothing on the K-1 itself is affected by the holding period of the different lots. If you follow the instructions elsewhere on this thread, your LT/ST...
Form 6251 is only for AMT (alternative minimum tax). There's nothing to do for that unless TT tells you that you need to file those forms.
On the Ordinary Gain...
Its not clear if all 7 MLPs are in your IRA, or some are in a non-IRA brokerage account.
If any are in a regular taxable account you should update your turbota...
The only mistake TT is known to make is around mishandling the Cap Gain/Loss info if the sale info is entered during the K-1 interview. If you've avoided that, ...