Missing purchase order, typos and customer payments in QBO

Good morning, @773515.

Thank you for taking the time to drop by here in the Community space. I'd be glad to assist you with your concern about making corrections in QuickBooks Online.

I've checked the attached spreadsheet and see there are transactions affected from the prior year. It'll impact many areas if you make changes like sales tax and other information.

If you intend to retain the prior closed year's info then you can make all the correction entries using a current year date. In case you need to edit closed books, I've included a link for your reference: Edit your closed books.

Previous years' invoices feed the P&L and balance sheet used for tax filing. It would be best to be more cautious in correcting your books.

I highly recommend working with an accountant throughout the correction process. They can provide expert advice on how to handle typos on the amounts and other details of your prior transactions. This help ensure your books are accurate and error-free.

Also, journal entries let you move money between accounts and force your books to balance in specific ways. To learn more about how it works in QuickBooks, I've attached this article: Create a journal entry in QuickBooks Online.

Please don't hesitate to get back if you have follow-up questions about your existing transactions. I'd be happy to help. Have a great day.