Would be nice to see a sample invoice. I need to include line items describing the work I did with hours and rate.<p>I use PayPal for invoicing (free, you don't have to receive payment through them) with Google Calendar reminders.
Feedback on sample invoice: tax should be a line item and include a description of the tax. Adding it below 'total due' is confusing. Not having a description makes it even more so.<p>Good luck.