My husband and I have separate usernames and passwords for turbo tax, does this matter? Do we need to combine them?

[SweetieJean]

Do you file Joint?

[Critter]

Well you cannot combine them so if you file separate returns you can just use the accounts you already have.  If you want to file a joint return then you must choose one of the accounts to use (usually the one that is more complicated to transfer in the prior year info)... then make sure you keep the taxpayer positions the same... switching places can confuse the IRS.  Or you can start a completely new account with a new user ID. 

[VolvoGirl]

Did you get married this year?  Or last year did you file married filing separately?

You can not transfer from or combine 2 returns or accounts.  Just pick the return for the spouse that has the most complicated return to enter or has any depreciation or business or  more investments.  Or use the account for whoever you want to be listed first going forward (by the way you can not change the order of the names).  Then add the other spouse's name, ssn and info to it.

You should usually  file a Joint return which is only 1 return combined for the both of you.  Make sure to stick with this one account for the future.  Just ignore the other spouse's account.

And info on Getting Married…..
http://turbotax.intuit.com/tax-tools/tax-tips/Family/Getting-Married/INF12006.html
 
Is it better to file Joint or Separately?
https://ttlc.intuit.com/questions/1894449-is-it-better-for-a-married-couple-to-file-jointly-or-separ...