If the form will be signed electronically, I'll answer the question "Yes". If, for some reasons, T183 is later signed in person, I'll just change the answer to "No" before e-filing the return. 

I also noticed that when the question "Did the taxpayer electronically sign the T183?" is answered "Yes", then the date and the time of signature revert to blank. So, I'll have to ask such clients to sign, put the date and the time. Then, I think, I will have to manually enter the date & time from the signed form. If anyone else has other comments/ideas, I'd appreciate hearing them.