Hello. I needd to modify the receipt template. The actual is like a letter format, and i need a simpler receipt because i only have a 58mm thermal printer

I can provide some details and solutions with pictures to assist you with your QuickBooks Online sales receipts template, @geovaldes2. 

In QuickBooks Online, you can change the sales receipt's color font. However, we're unable to set the paper size to thermal paper. 

Here's how:

1. Go to the Gear icon and select Custom form style. 
2. Locate the template and click the Edit hyperlink. 
3. Choose Design and hit Try other colours. 
4. Pick Black and press Save. 

For more information, see this link: Customise invoices, estimates, and sales receipts in QuickBooks Online.

Printing receipts in thermal paper size is a valuable addition to QuickBooks, especially for customers using this kind of printer. I suggest sending feedback to our product engineers. They can evaluate this and possibly incorporate it into the next release. Let me guide you on how:

1. In your QBO account, go to the Gear icon on the upper right side. 
2. Click Feedback under Profile.
3. Type your suggestion in the box and tap Next. 

QuickBooks has a website where you can vote and give feedback for all future suggestions. For more details, visit this link: Customer Feedback for QuickBooks Online.

Also, check out the article below to learn how to record your total daily sales in QuickBooks using a single sales receipt and email them all at once:

• Record your total daily sales in QuickBooks Online.
• Email or print multiple sales forms in QuickBooks Online

Do you have any other concerns about your sales receipts, data, expenses, and reports? Let me know, and I'll address them accordingly. Keep safe, @geovaldes2.