I just had a similar problem. it kept taking me to a line on my schedule C. I went thru all the forms trying to see where the item was showing from but no luck. it was a locked line and I couldn't delete it or change it. Out of frustration I did a right click and there was an "Override" so I clicked it and it let me delete and/or change the info for that line. Once I did that it let me submit the return. Just make sure the info you put in or take out is correct and doesn't change your return unless you want it to, Mine was just a matter of having a zero dollar amount in there and I just deleted it cause I didn't have that item to report.
