There is currently an error in the software that is causing a miscalculation of box 52/53 not adding up to box 21.  There is a thread that discussing this.  We are waiting on a fix from Turbotax. 

https://turbotax.community.intuit.ca/community/troubleshooting/discussion/re-error-t3-box-52-and-53/...

I am doing my taxes and the other information boxes  52 and 53 add up to the capital gains in box 21, why does it add on instead of balance out . It’s looks like it’s reported twice

Its a error in the software.  They said to be patient as they are aware of the problem. LOL  Its going on 3 weeks now and still not fixed. 

Yes, the errors disappear when I enter box 52 and 53 in 'Total Capital Gains' instead of 'Foreign Capital Gains' but the amount owed then shoots up by over $500.

Could be right?

@rgrabo65 We are aware of this issue, and our development team is working on a resolution. Currently we don't have any ETA. Once it is resolved, we will update you in this thread. We appreciate your patience.

My wife has been using Turbo Tax for years and years, and this year has the T3 box 52 and box 53 issues with capital gains.  We are trying to enter them on my form entry with 50% share of all values with my wife.  My entries came out as 100% of those two boxes going into the capital gains calculation and my wife’s entries for this came out as $0.00.    She has spent extra hours deleting and re-entering each T3 slip, trying different duplicate box number locations, etc, to try and determine what is wrong.  She has been downloading all updates from Turbo Tax that come up on the screen when she starts up the program, but this issue can’t be resolved.  This is extremely frustrating and time consuming and we need to file our taxes.  Please get the software fix done asap and an update out to everyone.

Loaded the update and then tried to netfile but CRA rejected, ci5ing Error Code 95365, where figures aren't transferring properly to lines 68140 and 68150 on form T936.  Have others encountered this, and what's the fix for it? I've been trying to file for weeks now.

T3 was made out to the wife.   Turbo-Tax split it correctly into the 50/50 split.  Husband's T1 was filed without any issue - with the boxes 21, 52 & 53 going into the proper respective areas in the T936 and Schedule 3.    However, the same 50% slit in the wife's schedules (even though it was exactly the same as the husband's entries in the T936 and Schedule 3), was locked by CRA and not accepted.   

Note: on April 3 I did the last available update from TurboTax. 

I tried all sorts of work arounds (manually splitting the T3 per the 50/50 requirements on the T3, not entering the amounts in 21, 52 & 53) but got the same message from CRA - wife account is locked.     I spent 4 hours yesterday on the phone with CRA and 11 times transferred to another agent all to no avail.   In the end, the last agent took my number and hung up - never to be heard from again.   

It appears that the error may be a CRA issue as the message from CRA is, "Your account is locked.  If you need assistance, please contact us..." - via a useless internet info site.   

CRA number [phone number removed] - with any luck other than hearing "all agents are busy", you may get to wait 1 hr. before getting an agent.