How i can start the new year with a new serial number for the invoices?

Hi, Georgia. Good news! I know how to start the new year with a new serial number for invoices in QuickBooks Online (QBO). I'm here to share them with you.

 When you enter an invoice for the new financial year, you can input the unique number in the Invoice no. field. This way, the system will generate the information for each transaction successively and automatically. Here's how:

1. Sign in to your QuickBooks account.
2. Go to the +New from the left panel, then Invoice.
3. From the Invoice no. field, type number.
4. Enter invoice details, then save the transaction.

I'm adding this screenshot for your visual reference.

You may also read the details from this article for more guidance in setting up numbers for your sales forms: Add custom transaction numbers to sales forms in QuickBooks Online. 

Once your customers made their payments to your invoices, you're now ready to record the payments. Learn more about the process from these links: 

• Record invoice payments in QuickBooks Online
• Record and make bank deposits in QuickBooks Online

Please let me know if you have other questions while managing your transactions in QBO. I'm always here to help. Keep safe!