The EFILE window for a T2 return is blank and does not display a confirmation message or error number:
Resolution
The web link established to transmit the T2 return may have accidently been changed from the default settings.
1. Select Options in the EFILE drop-down menu from the top toolbar. The Electronic Filing Options window displays.
2. Select General in the left-side menu bar.
3. Select T2.
4. Select Default in the EFILE Web Service section.
5. Select OK.
6. Attempt the EFILE of the T2 return again; the issue should be resolved.
If the above solution did not resolve the issue, try one of the following: