I filed my taxes last year with someone else, and I don't remember what website I used or where the paperwork is. can I use a 2014 one as well?

[keatonkleinfall1]

I filed 2014 taxes with TurboTax, but I don't have the same account on here. in 2015 I filled through I think TaxAct, and this year I am using TurboTax again.

[DoninGA]

A 2014 tax return data cannot be transferred to the 2016 tax return.  

To e-file your 2016 tax return you will need the 2015 AGI or the 5 digit self-selected PIN you used for the 2015 tax return.  If you do not have a copy of the 2015 return then you can get a free federal tax return transcript from the IRS, online or by mail -  https://www.irs.gov/individuals/get-transcript