I can help change the date format in QuickBooks Online (QBO), kamilya.
We can modify this in the Accounts and Settings section. Please follow the steps below to proceed:
Once done, open an invoice to verify the date format change.
I've added this resource to help personalise your invoices and other sales forms in QuickBooks: Customise invoices, estimates, and sales receipts.
You might also want to consider changing your QuickBooks Community username, as it contains your email address, which could compromise your privacy and security.
Keep in touch if you have other concerns about managing your invoices. Doing so helps us ensure everything is taken care of.
You have clicked a link to a site outside of the QuickBooks or ProFile Communities. By clicking "Continue", you will leave the community and be taken to that site instead.
For more information visit our Security Center or to report suspicious websites you can contact us here