The error message refers to Line 12a and 12b on Carryover Worksheet under Loss and Expense Carryovers. Line 12 is for Short-term capital loss carryovers, (a) for regular tax and (b) for Alternative Minimum Tax. If this doesn't apply to you (you have no short-term capital loss carryovers), you may enter zero for these boxes.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"