Incorrect W2

You’ll need to amend her return since a married couple filing jointly must report both spouses’ income on one return. Was her tax return filing status Married Filing Jointly? Because the software asks questions about the spouse's income,  and she'd have been made aware that your income needed to be reported as well. 

If you want to make changes or add a document to a tax return that has already been filed and accepted by the taxing agency, you should follow these guidelines. 

1. You must first wait until the initial return is completely processed. This means waiting until the payment submitted with the tax return has been processed, or your refund has been received.
2. You will have to use the same TurboTax account that you used for the original tax return.
3. Once you begin your amendment, you'll see your original return.
4. The refund calculator will start new at $0 and only reflect the changes in the refund or tax due
5. Only make changes to the areas of your return that need to be corrected.
6. You have three years from the date you filed your return or two years after you paid the tax due (whichever is later) to file an amendment

Filing Joint is one return for both of you.  All the income & deductions go on the same return.  You will need to amend her return to include your info.  Did she pick Married and filing together?  You haven't filed your return yet right?

If  the first return was efiled and Accepted or you mailed it, then you need to do an Amended tax return to correct or add new info. You need to wait for the original return to be fully processed and you get the first refund or paid the tax due. Then you can Amend. Be sure to save a copy of your original return before you start the amended return. The Amended return will overwrite the original return.

How to Amend the current year
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-federal-tax-return-current-year/L7eS6o1qh_US_en_US?uid=lfunevhk