I want to put a clickable link to take clients feedback in the invoices, how can I do that ?

Hi there, @adamubcool-gmail.

I'm here to help you put a feedback link to your customer's invoice in QuickBooks Online. 

You can put the feedback link to your customised invoice in your account. To start, let's create an invoice template or edit it if you already have one. Let me guide you how. 

1. Go to the Gear icon, then choose Custom form styles. 
2. Click Edit or the New style drop-down and pick Invoice. 
3. Select Email, then enter your link in the Message to customer box.  
4. Tap Done. 

For more details, visit this article: Customise invoices, estimates, and sales receipts in QuickBooks Online.

After that, I'd recommend creating a sample invoice to see how this looks like. 

Here's how: 

1. Go to the Plus icon, then choose Invoice. 
2. Pick the customer's name in the box. 
3. Complete the required data. 
4. Click the Customise button, then choose the template you previously created.
5. Tap Save and send.

Additionally, you can always access any customer reports by reviewing all the data you've entered into the system. Then customise it to show precise information. 

You might also check out these articles below about memorising reports, handling customer invoices, and other topics. 

• Memorise reports in QuickBooks Online
• Help Articles

Feel free to leave a message below if you have additional questions about the feedback link or other QuickBooks related. I'm eager to help you.