To record an expense with Moon Invoice, follow the below steps.

1. Login to the Moon Invoice account
2. Click on Purchases > Expenses
3. Click on Expenses
4. Click on the '+' icon to record an expense. 
5. Fill in the mentioned expense fields, including the vendor name, currency, expense number, date, default taxes, expense amount, shipping cost, payment type, description, and total cost.
6. Click on the recurring checkbox if the expense is to be recorded as a recurring expense. 
7. Click on Save to record an expense successfully.