How do I record a transfer from my wife that accidentally went into my business bank account, which I subsequently sent back to her?

Hello there, @Adam 75.

I've got you the steps to guide you in transfering funds to your wife's account. 

To do this, let's write a check or expense coming out of the company. Here's how:

1. Select + New, then select either Check or Expense.
2. Select the bank account the funds are coming from.
3. Enter the Payee, Payment Date, and the Payment Method (optional).
4. Under Category details, in the Category column, select an Asset or an Equity account to reflect the funds going out of the business. 
5. Enter the amount of the transfer in the Amount column, then click Save and close.

It's also best to consult an accountant or tax proferssionals for guidance in choosing the correct account to make sure your books are accurate.

For future reference, check out these articles to learn about the different ways in recording transfer transactions in QuickBooks: 

• Transfer funds between accounts
• Transfer funds between companies

I'm always around here to help you again in case you need some more. Take care!