I'll help you set the invoice number, Ginda.

First, let's change the settings and turn on the Custom transaction numbers feature. This way, you can control the sequence. Here's how:

1. Click the Gear icon.
2. Select Account and Settings.
3. Go to the Sales tab.
4. Click the Pencil icon in the Sales form content row.
5. Tick the Custom transaction numbers box.
6. Click Save, then Done. 

Once done, you can now manually add the invoice number. QuickBooks Online will remember the number and continue the sequence. 

If your customer pays the invoice, you can record the payment. 

Keep in touch with us if you have additional questions.