MFS Where do I need to go to enter the 1/2 values for the 8949? Only Form 1099-B, Capital Loss Carry forward Worksheet and Schedule D is that all that I need to do?

We are filing MFS, and I entered 1099-DIV by dividing and overriding the original amount with half.  There's also 8949 proceeds, cost and net loss.  Where do I need to go to enter the 1/2 values? If I change the amounts to half on Form 1099-B, Capital Loss Carry forward Worksheet and Schedule D is that all that I need to do?