In QuickBooks Online, go to the gear icon, then Account and Settings, then the Sales tab, and open the Messages section to edit the default subject line and body text sent with invoices, estimates, and other sales forms. Each form type gets its own message. Here's the full process, plus the separate path for QuickBooks Desktop.
1. Click the gear icon, then Account and Settings, and switch to the Sales tab.
2. Find the Messages section. Scroll down to Messages and expand it. You'll see separate fields for the default email subject and body, usually broken out by form type: invoices, estimates, and so on.
3. Edit the subject and body. Change the text to whatever you want customers to see. QuickBooks supports placeholder fields like the customer's name and the invoice number, which get filled in automatically when the email actually sends.
4. Save. This becomes the new default for every invoice or estimate you email from here on, until you change it again.
5. Override it for a single transaction if needed. When you're on the Save and send screen for a specific invoice, you can edit the subject and message just for that one email without touching the default setting.
6. For a different look per template, use Custom Form Styles instead. If you want a specific invoice template to have its own email message distinct from the account-wide default, go to Settings, then Custom Form Styles, open the style, and check the Emails tab, which lets that template override the general Messages setting.
Desktop handles this through a different menu entirely, and it's worth knowing which version you're on before hunting for the setting. Go to Edit, then Preferences, then Send Forms, then the Company Preferences tab. From there you can select a form type (Invoice, Estimate, Statement, and more each get their own entry) and edit its email template, subject line and body included, with the same kind of placeholder fields QBO uses.
Desktop also lets you create more than one named template per form type and pick which one applies when you send, which QBO's single default-plus-override model doesn't offer directly, that's effectively what Custom Form Styles replaces in QBO.
A default message is fine until a customer asks why every invoice reads like it was written for nobody in particular. Past that, the real friction isn't the wording, it's that the same message goes out whether the invoice is a first bill, a reminder, or a final notice, and nobody's rewriting it by hand for each situation.
A business sending a meaningful volume of invoices usually wants the message to vary by context: a friendlier tone for a repeat customer, more urgency once something's overdue. QuickBooks' message settings don't do that on their own; they're a single static default per form type, not a set of rules.
The email subject and body sent with an invoice adjust automatically depending on whether it's a first bill, a reminder, or final notice, pulled from your collections workflow instead of QuickBooks' single static default.
Details that don't live in QuickBooks, a project name, an account manager's name, a reference number from another system, get inserted into the email automatically instead of someone editing each one by hand before sending.
Tell us the different cases, new customer, repeat customer, overdue, and we'll tell you if the right message can be picked automatically.
Tell us where the default message falls short for your business, a tone that doesn't fit, context it's missing, and we'll tell you whether that can be automated instead of hand-edited per send. Invoice emails are one small example; we go after whatever else is manual in your business too.
Let's talk →Go to Edit, then Preferences, then Send Forms, then the Company Preferences tab, select Invoice from the form type list, and edit the subject and body. Desktop lets you save more than one named template per form type if you need different versions.
Same Messages section in QBO (gear icon, then Account and Settings, then Sales, then Messages), just select Estimates instead of Invoices from the form type options; each has its own separate default text.
That's a different setting from this page, your QuickBooks login email rather than the message sent with invoices. It's under Settings, then Account and Settings, then the Company tab, in the contact information or sign-in details, not under Sales or Messages.
The message body supports plain text and basic formatting, but for a branded look (logo, colors, a formatted signature block), that typically lives on the invoice template itself via Custom Form Styles rather than in the plain-text email wrapper around it.