How do l change the invoice sequence numbers from a mobile set up not a pc

Welcome to the Community, usertess-h72. 

I'd be glad to show you on how you can change the invoice number sequence on a mobile. 

1. On the Invoices section, tap on the invoice to open the transaction.
2. Tap the small pencil icon in the upper right hand corner.
3. Enter the correct and starting invoice number to set. 
4. Then, tap Done. 

Invoice number will automatically generated for you on the next invoice you're going to create. 

For your reference, you can check on this article: How to set up custom invoice numbers.

Let us know if you need any help, usertess-h72. Have a nice day. 

How do i customize invoice/estimate numbers when using Desktop Pro 2021?  I don't have a gear icon in the upper left corner.  I thought if I manually changed an invoice then the subsequent invoices/estimates would automatically change in order, however this morning they are reverting back to the original format.

Thank you,

[email address removed]

Hello, Montesano.

I'll drop a couple of solutions to help us fix the custom numbers in QuickBooks. 

The Gear icon is only available in the Online version. In QuickBooks Desktop, we would normally enter the customer format in the Invoice # or in the Estimate # field. Since it reverted back to the original format, let's dig a little deeper and fix this. 

Did you change the number format on an already saved estimate or invoice? Editing the format won't affect the next transaction's sequence or order. It'll just use the original format prior to changing it. 

We'll want to change the format on the next invoice or estimate and save it. The next entry will use the new format and sequence. 

However, did you change the format as you created the invoice or estimate? An issue on the component is likely causing the format to revert when you change it. In this case, we'll want to run the Tool Hub to fix this. 

We can download the Tool Hub utility here: Fix company file and network issues with QuickBooks File Doctor. 

The article points to the US version, but it'll work fine for your QuickBooks Desktop version. 

After fixing the issue, do you need to run a few reports to check your receivables, open estimates, or other financials? I'll drop an article that would help us familiarise on what reports we can use: Understand reports. 

You can always drop by here if you have questions about your custom forms or entries. If you happen to come across any difficulties while managing your records, reports, and taxes, let me know and I'll help you out.