Invoice Template Customisation: You can now easily customise your invoice templates and import your own invoice design by importing a Microsoft Word .docx file directly into QuickBooks Online.
To turn this setting on: navigate to the Gear icon > QuickBooks Labs > Import Style
To use: Gear > Custom Form Styles > ▼ to the right of New style > Import Style
Click “Download a sample invoice” to download invoice samples and instructions
Add invoice numbers to the email subject title: You can now add invoice, sales receipt, credit memo, and estimate IDs to email subject lines.
To do this go to Gear > Company Settings > Sales > Messages > Estimate/Credit Memo/Sales Receipt > Use standard message. Note the variable [No.] in the Subject field.