@dollhouse Let us know how it goes. Thanks 

I just updated my turbotax  (april 23rd)and I'm still having the issue. None of my T3 line 21 capital gains is showing up on my capital gains in my return. Please fix asap.

So the fix seems to be report in both box 53 and box 21?

@investor12 

For all T3 slips in your return: - Remove the amount from Box 52, if applicable (leave it blank) - Enter the sum of Box 52 + Box 53 in Box 53 - Ensure Box 53 equals the amount in Box 21 If the error persists, try rounding the box amounts (21 and 53) to the nearest dollar and submit via NETFILE once more. 

Thank you for using TurboTax.