Please note that converting the database from QuickBooks UK to QuickBooks US is not supported. To understand more, see my explanation below.

For a smooth migration of the database from QuickBooks Desktop to QuickBooks Online, we recommend canceling your QBO US subscription and subscribing to QBO UK. It will help avoid any potential difficulties during the upgrade process.

However, you can also use a third-party service and check any integrated apps that can migrate the data and transactions from QuickBooks UK to QuickBooks US. Alternatively, you can manually input your data into your QuickBooks US subscription.

For a comprehensive guide to managing your business with QBO and understanding the necessary steps to take after inputting each entry in the software, see this article: Get started in QuickBooks Online: a quick tour & what to do next.

To request assistance with QBO utilization for your company, please post or reply below. We are here to help. Stay safe.