How do I input my total cost basis with a blank box 1e? I tried "I need to adjust my total cost basis" but the number was added to box 1d instead of subtracting.

Let's say my proceeds (box 1d) are $150 and my total cost basis (box 1e) is $300. Instead of saying I took a loss of $150, it's saying I made $450. I did try to input it as negative number, but I'm sure that the IRS would have some questions for me.