Rent receivable are not showing in net sales on VAT detail report whereas they were in the VAT returns I have previously submitted. Any ideas what I may have done wrong?

Welcome and thanks for dropping by the Community, @Mike Rimmer.

The VAT Detail Report lists transactions that are included in each box on the VAT return. If the date of the report is correct and it's still now showing, try logging into your QuickBooks Online (QBO) account using a private browser (incognito). There are times that the browser is full of frequently accessed page resources, causing some unusual responses.

Here's how:

• Press Ctrl + Shift + N (Google Chrome).
• Ctrl + Shift + P (Firefox).
• Control + Option + P (Safari).

Once signed in, try to pull up the report again to double-check.

If it's showing, return to your default browser and perform a clear cache. Every so often the cache becomes overwhelmed with older data which can potentially cause viewing and performance issues. Clearing it will refresh the system, and you'll be able to work with a clean slate. However, if the issue persists, try using other supported browsers.

Just in case, I'll add this article for future reference: VAT Detail Report.

Please know that I'm only a post away if you have any other issues or concerns. I'll be here to help. Have a good one!