It is important to correctly account for the VAT paid from your import broker and ensure it is reflected in your VAT returns. Currently, entering an invoice that only affects VAT isn't possible, Grahamn.
Whenever you create an invoice with VAT in QuickBooks, the system automatically calculates the taxes which are then totaled to your VAT return.
The reason your three VAT returns aren’t showing in the VAT Suspense account is that they haven’t been submitted to HMRC yet. The VAT Suspense account tracks the amounts that have been filed with HMRC but are awaiting payment or refund.
Please note that VAT returns that haven’t been submitted are posted to the VAT Control account. To ensure returns are reflected in the VAT suspense account, you'll need to submit them to HMRC.
For you to understand more about VAT Suspense and VAT Control accounts, check out this article for your reference: Understanding VAT Control and VAT Suspense in QuickBooks.
If you have any questions or concerns regarding VAT accounts, please don't hesitate to reach out. The Community team is always here and ready to help you.