Hey there, @3axis. 

Thanks for reaching out to the Community. 

To clarify, are you referring to progress invoicing? Progress invoicing is billing for a project that stretches over days, weeks, months, or sometimes even years. You can choose how much of an estimate you'd like to convert into an invoice, keep track of home you've invoiced, and continue converting from the original estimate until it has been fully invoiced. 

Check out Set up and send progress invoices in QuickBooks Online for additional details. 

However, if you don't mean progress invoicing, please do let me know. I'll be sure to keep an eye out for your response. 

Feel free to reach out to the Community any time. Take care and have a great weekend. You certainly deserve it!