You can't change the W2s you received. And what you claim at work Single or Married does not have to match your actual tax return. That's just to tell the employer how much to take out. If you have multiple jobs you might want to leave it at Single. Because when you have more than 1 job or are Married the combined income will be taxed higher than each job separately. So you may want to have more withholding.
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.
Getting Married FAQ
https://ttlc.intuit.com/community/tax-filing-status/help/what-does-getting-married-mean-for-my-taxes...
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...
Compare Joint to Married Filing Separately
https://ttlc.intuit.com/questions/2895312-how-can-we-compare-married-filing-jointly-with-married-fil...
