Yes, separate businesses should be completely separate from one another in TurboTax in terms of data inputs for income and expenses.
When you revisit the business section of your return, you should see two separate businesses entered for the different names you mentioned. Edit each one and double-check that one is showing that you did the work and the other shows that your wife did the work. Once you are certain that there is a business for each of you, then go through the process of entering the income for each separate business.
You mentioned that you entered income and tried to 'back out' to enter the income for the second business. Don't back out of the process. Enter the income and keep moving forward even if you do not enter your expenses at this time. Backing out may not have tied the income to the business correctly.
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