Invoice numbers

Let me help you fix the duplicate invoice number in QuickBooks, @Greg Carpenter. This way, you won't get confused in your customer transactions.

There are two possible reasons why QuickBooks use the same or old invoice number: 

• QuickBooks will use the same or old invoice number if other transactions are linked to the project.
• It could be that you're experiencing a browser issue. 

You can fix this by editing the invoice and entering a new number. Continue with the following steps:

1. Go to the Sales menu in the left panel and select All Sales.
2. From the Filter drop-down, choose Invoices as the Type of transaction.
3. Click Apply and locate the duplicate. 
4. Double-click the transaction and modify the invoice number. 
5. Hit Save and close. 

Sometimes, the browser is full of frequently accessed page resources, thus causing websites like QuickBooks Online (QBO) to act weirdly. Try logging into your QBO account using a private browser.

You can use the shortcut keys below:

• Ctrl + Shift + N (Google Chrome)
• Ctrl + Shift + P (Firefox)
• Control + Option + P (Safari)
• Ctrl + Shift + P (Microsoft Edge)

Once logged in, create a sample invoice to verify if it's performing well. If it's fixed, please return to your regular browser and press the CTRL+ Shift and Delete keys on the keyboard to clear the cache.

I'll add these articles for future reference:

• How to show transaction numbers on sales forms.
• How to find the duplicate invoice, estimate, or sales receipt numbers.

I want to ensure everything is taken care of for you, so please let me know in the comment if you have any other concerns. I'll be here to assist. Keep safe.