No-charge on Time Entries: In LeanLaw, when creating or editing a time entry, you have the choice between Billable, Non-Billable, and fixed fee. Flipping the entry to Non-Billable will still track the time, but won't charge the client.
Discount the Invoice: QuickBooks Online
In QuickBooks, you can show the discount (percent or $ value) after subtotal. You can change the percentage by clicking the box beside it. Once done, hit the Save button below.
First, You must change the discount setting under the Sales form content.
From the homepage screen, go to the company gear (located top upper corner)
Select Company Settings
Select Sales under Settings
Select Discount ON under the Sales form content heading
To discount individual line items in your QuickBooks Invoice, follow the guide posted here.