Does Mark to market election under sec 475 for first time for 2019 prevent me from e-filing for 2018?

[twistedether]

Can I elect Mark to Market accounting under section 475 for the year 2019 and still be able to e-file 2018 Tax Return?  Or do I have to paper file 2018 tax return?  Please note I was not a full-time trader or had any trading business in 2018.  I am making this election for the first time and that too for year 2019.

[twistedether]

Thank you for your response.  How about this?  Why can't I just e file my entire 2018 tax return.  Then separately simply mail the election using form 8453.  Kinda like the situation here: https://ttlc.intuit.com/questions/4400974-i-have-already-filed-my-2017-return-but-want-to-make-a-mar...

Is that okay to do?

[Derek_H]

Hi - 

Thank you for your very informative email.  Do you know whether TurboTax supports the MTM accounting method for trading after the MTM election is made?  I made the election for the 2018 tax year outside of TurboTax but would like to return to TurboTax this year.  Thank you for your help!