How can I get a confirmation of my e-filing status for my 2014 tax returns now in 2019?

[macuser_22]

Nowhere really, unless you saved the accept or reject email when the 2014 tax return was e-filed.  TurboTax does not keep filing statuses of old non-supported tax years.

[mesquitebean]

If you saved a 2014 PDF with all forms and worksheets, there should be a page called Electronic Postmark.

If you used Online TurboTax, does the 2014 PDF you download include a page called Electronic Postmark?  The PDF may or may not have all the worksheets.

Why are you asking?   Why are you needing such?  Is the IRS claiming that  you didn't file a 2014 return?

If you used Online TurboTax, log into your account and at the Tax Home go to the section "Your Tax Returns & Documents".  Expand that section and choose tax year 2014.    What is shown there for "status"?    Does it say accepted, rejected, printed, started, ready to mail, or what?