You are going to have to amend. Wait and see which return gets accepted at the end of the month. Then amend it to add all the income and both children on the same return. A Joint return is one return combined for the both of you. Or hopefully both returns will reject and you can pick either one to add the other person to it and ignore the other one.
This is too late now but here's some notes for getting married.........
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
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/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.
