i'm married and filing jointly. my box 1 wages is $10,000. My wife's is $10,000 but there is no place to input her wages. What do i do?

Go back to Federal>Wages & Income and click Add Another W-2.

When you are entering income on a joint return, every income entry screen will either have a spot with both spouse’s names there, or when you click to enter a W-2, 1099R, etc. it will ask you by name which spouse it is for.  You do not have to wait for the software to “ask” you for your spouse’s income.

Did you already file it?  If you efiled and it gets Accepted you have a problem.  You will have to amend to add  her income.  First  you need to wait until the IRS is done processing it and you get the first refund.  Then you can amend so don't change or add your return until you start the amended process.  

If you did not file it yet or it rejects you enter her income the same way you entered yours.  

Federal Taxes Tab
Wages & Income
Wages and Salaries- Click the Start or Update button

Then if you are married you should have 2 buttons...Add w-2 for (taxpayer name) and Add w-2 for (spouse name). Click on the correct button to add a W-2.

I am assuming you did not yet transmit your return.

1) Be sure that you added her as a spouse on the return and not in the dependent section.  You will be able to verify this in the Personal Info section

2) Go to the W-2 section and select Add a W-2.  When you do this, you will be able to select, this W-2 belongs to XXXX.  Select her name and then walk through the steps to enter her W-2.  If you have any other forms, you will do the same thing, select add a XXXX form for her. 

If you did already transmit your return, you will need to Amend Your Return in order to do this.