How can I create a billable expense.?

How can I create a billable expense.?

Hi, I've a bill of an expenses related to printing and stationary account but it recorded in non-billable expense category. How can I record this expense in billable category. Below is the pathway I've used to record the expense.
  1. Purchases.
    1. Expenses
      1. Click on new record expense.
After following pathway the expense is saved under non-billable expense category.