Before submitting your return to the CRA, you must add or report all of the information. Are you receiving any Netfile errors after adding capital gains?

Thank you for choosing TurboTax. 

I am getting errors for netfiling due to box 52, 53 and box 21 

@michelejolley 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.

A new update was released today, so make sure the software is up to date.