After you file

What is turbotax's position in this?  Should I re-efile and if so they should provide an option to refile - the system does not allow?  Should I send in a mail return?  Should I submit an amended return with some minimal change?  You cannot reach an IRS agent to assist you - you are constrained within their limited voice program.  My tax return is not complicated and this is  the first time I attempted to efile which appears to be a big mistake!