Hello, oatmealr82.

I hope you and your wife are doing fine today! I appreciate taking the time to get back here. I'll clarify my colleague's answer and give details on how to handle the accounts. 

If you and your wife use QuickBooks Self-Employed together, then she'll want to create a new account. Follow the steps provided by MaryLurleenM. The idea here is to enter both of your income and expenses separately. 

I take it that you've already enabled joint filing in TurboTax. In this case, you can send the QuickBooks Self-Employed data to TurboTax. Your wife would enter her own data to your TurboTax account. 

I'd recommend letting her contact the TurboTax support so they can guide her in entering her data. She can post her questions here. 

If your wife is the only one using QuickBooks Self-Employed, you can share your login credentials with her (tied with the TurboTax bundle). She doesn't have to create a new account. You have the option to change the email in QuickBooks. Since both programs are synced, this will also change the credentials in TurboTax however. 

If you decide to change the email address: 

1. Click the Gear icon, and choose Intuit Account. 
2. Go to the Sign in & Security tab.
3. Expand the Email address section. 
4. Enter the new email address and confirm it.
5. Type your password, then hit Save. 

If you need help managing your QuickBooks Self-Employed account, transactions, etc., you can read our articles. They contain the details and guides on how to get things done in the program. Browse for a topic and choose an article here. 

I'm more than happy to help your or your wife if you have other questions. Simply add the details in the reply below and I'll get back to you. Have an awesome day ahead!