Invoice Date: The issue date for the invoice. Pro tip: Getting your invoice out in a timely manner can help you improve cash flow and get paid faster. Bill your customer using the mobile invoicing app, right after you finish the job.
For any type of business to succeed, you have to get paid. So whether you do one freelance gig a month or run a full-time writing business, you need to calculate the time you've worked and bill your clients for it.