What is the reason given for not being able to e-File. Sometimes this is an area we can assist you with working around, but occasionally returns must be mailed for processing depending on the nature of the issue.
Change your phone number to a US number in the Intuit Account of Turbo Tax. No need to verify this number in the Intuit Account just click exit when your are done. Then go back to you return an continue filing.
Solution: Intuit Account -> Sign In & Security -> Phone (change & save no need to verify) -> back to e-file and retry.