As a second reply I tried removing the capital losses I entered and input them in the T5008 section. No change.
Next I removed all capital gains and losses and then box 21 from the T3 did transfer into box 68140.
Next I added a capital gain in the T5008 section and box 21 from the T3 still transferred into box 68140.
Lastly, I added a capital loss stock in the T5008 section and box 21 now DID NOT transfer into box 68140.
