How do I make myself the "spouse" if i am logged into my account as myself?

[GeorgeDenseff]

Put your spouse's name, social security, and other information in first like the spouse is the person logged in.  Then put your information as the spouse.

[Critter-3]

If you are trying to use an account where in the past you were listed as  the taxpayer  then DO NOT  try to switch places.   You have 2 options : 

1) start a new return in a new account ... do NOT try to transfer the prior year info over ... everything must be entered anew

2) simply remain the primary on the return in the old account and add the spouse as spouse ... the IRS doesn't care who is listed first or who makes the income on a joint tax return.  Doing this will allow the prior year info to transfer forward which is good if you have a lot of items from the past to move. 

[xmasbaby0]

ORDER OF NAMES ON A JOINT RETURN 

https://ttlc.intuit.com/questions/1901551-does-the-order-of-the-names-on-a-joint-return-matter

[VolvoGirl]

Did you get married?

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/return 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. Joint has the lowest tax rates and the highest Standard Deduction. And if you are in a Community Property state MFS gets tricky to figure out. Make sure to stick with this one account for the future. Just ignore the other spouse's account.

Getting Married FAQ
https://ttlc.intuit.com/community/tax-filing-status/help/what-does-getting-married-mean-for-my-taxes...

Tax info on getting married
https://turbotax.intuit.com/tax-tips/marriage/getting-married/L0DvEUlEC