Thank you so much Antoine7.
Problem is that the return is for 2015 fiscal and CRA rejected my Netfile with the followign msg:
Error code(s):2123You claimed an employment insurance overpayment on line 450 of your return but your return was not filed within 3 years after the end of the year for which the request is made. Please delete the entry on line 450. However, if this correction cannot be made, validation checks in the Canada Revenue Agency's (CRA) processing system prevent your return from being accepted for NETFILE. Please send a paper return for processing. The CRA regrets the inconvenience.
Form T2204 is present on my return, but CRA still not happy to take it. The claimed overpaid amount is just 18 dollars. Im willing to waive this moneys to be able to Netfile, but can figure out hot I could do that. Any recommendation is centenary welcomed.