Retirement tax questions

Hello,

 

I entered the Canadian Pension as "General Category Income" and use "Foreign Taxes Credit" to get the withheld tax back.  In addition, I also have a small amount of foreign tax withheld from  Mutual Funds, and I selected the Passive Income to get the MF fund foreign tax withheld back.  However, my tax submission was rejected multiple times even there's no error found.  Please see below error message, I have tried many times and don't know what I did wrong.  is it possible that  I couldn't submit my tax online due to large amount ( over two thousands dollar of foreign tax credit) on my tax return?  Please help, thanks. 

 

There was an issue with the submission of this return.  To correct, navigate to Deductions & credits Tab, under the menu heading Estimates and Other Taxs Paid choose foreign tax credit.  Proceed to answer all the questions in the topic.