In my business a client has a project that will be paid in more than one payment. I would love it if there was a section at the bottom of the estimate that automatically calculated the progressive payments based on customizable percentages and descriptions of the job. 

Example. Total cost of project is 20k plus tax. 

- Deposit : 10% = 2000$ plus tax

- start of project : 40% = 8000$ plus tax

- upon completion of xyz : 40% = 8000$ plus tax

- upon completion of job: 10%= 2000$ plus tax. 

Once this estimate is converted to invoice Then there should be a tab to record a payment which will automatically set the payment amount to the one of that payment.