If you go to MD form 505 you can find a column to enter Maryland K-1 income/loss (block 10). Use Override to enter K-1 income/loss in that column (this column is missing in TT interview and needs to be added). When turbotax checks it will warn you that you have done an override and can't e-file. But I checked with a TT CPA who said this was the only way to do it he could see.
