There is an FAQ on eFiling issue i.e.
https://ttlc.intuit.com/replies/6717018
If your issue is same then kindly subscribe at above mentioned FAQ. Once you receive an email for resolution then try to eFile after following below mentioned clean-up steps.
Otherwise, please follow TurboTax application temporary data clean-up steps mentioned below. You would need an active internet connection (wired
connection is preferred) for below mentioned steps.
1. Close
TurboTax application by pressing Command + Q keys.
2. Single
click on empty area on Desktop and press Command + Shift + G keys. Type
~/Library in text field and click "Go".
3. Now,
navigate to "Application Support" directory and select
"TurboTax Deluxe 2017". Remove it
by dragging it to Trash.
4.
Navigate back to Library directory (using back button "< icon" on
Title bar or follow step #2) and select "Caches" directory. Remove
"com.intuit.turbotax.2017" and "TurboTax Deluxe 2017"
directories by dragging them to trash.
5. Empty
Mac OS Trash directory by right click on Trash Icon and select "Empty
Trash" option.
6.
Restart your mac machine. Check internet connectivity on you machine.
8. Launch
TurboTax Deluxe 2017 application by navigating to /Applications directory.
9. Let
Product & Formset update to download & install, if available any.
10. Now, try eFiling again by
navigating to "File" tab & then fill information in required
fields. After hitting E-File button and wait for green submission check
marks. If initial submission fails, hit and resubmit E-file.
