You will go to Income -> Click on T-Slips, you will see a list of slips - scroll down till you see- RC210 - Working Income Tax Benefit Advance Payments - There you would of checked off RC210- So please uncheck it. Then you will continue- until you get to the page RC210 - Working Income Tax Benefit Advance Payments.- Enter the amount of working income tax benefit advance payments received in 2017. (If you see an amount in there - delete it). Then continue again so that it can save. Then you can go to Provincial go thru each page until you get to file once again.