If I'm filing married filing jointly for the first time do I have to submit my spouse's W2 along with mine?

[Critter]

YES ... that is what filing jointly means ... all income for both spouses is entered on the same tax return. 

[VolvoGirl]

Yes.  A Joint return is one return combined for the both of you.

Did you get married in 2019?

Here's some general info on getting married.  Did you both use Turbo Tax last year?

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