I appreciate you contacting the Community regarding modifying the email address when sending a Quote, GC101.

I've got the information you need to accomplish your goal today.

You can untick the Same as company email box and manually enter your workshop’s email address in the Customer-facing email section. This way, all responses will be sent directly to your workshop.

Here's how:

1. Go to the Settings icon and select Account and settings.
2. From the Company tab, click the Pencil icon for Contact info.
3. Untick the Same as company email box.
4. Then, enter your workshop email address in the Customer-facing email field.
5. Click on Save, then Done.

Here are resources you can check that provide details on managing email addresses in QBO:

• Change the email address your customers see in QuickBooks Online.
• Change your customer-facing email address.

In addition, I've added these links to help you personalise your sales forms:

• Import Custom Form Styles for Invoices or Estimates
• Customise Invoices, Quotes, and Sales Receipts in QuickBooks Online

If you have further questions about modifying emails or other concerns, please in the comments. I'm here to help you.