Creating an invoice is straightforward:
a. Create a client
b. Create an invoice
Create a client
1. Go to Clients tab
2. Click "New Client"

3. Fill in the form (email address is the only required field)
4. Click "Save"
Create an Invoice
1. Go to "Invoices"tab
2. Click "New Invoice"
3. Select your client:

4. Add invoice items as required:

5. Click "Save"