Hi there, 

Creating invoices is made simple when using QuickBooks Online! As a small business owner, time is money. That's why we've implemented awesome time-saving tools to help you focus more on doing what you love. I'll explain how you can take advantage of the Recurring Transactions feature to create bi-weekly invoices automatically. 

Follow the steps listed here to create Recurring Transactions: How to create a recurring invoice and manage recurring transactions. 

If you want to create the transaction every other week, select Weekly, then every two weeks. 

Simple as that! If you have any other questions, please don't hesitate to reach out to our tech support team. 

Have a great day.