I would like to allocate a bank transaction which I have already downloaded to some supplier invoices and customer invoices.

Hi there! I'll assist you in handling the transaction in question, njdarling87.

If a transaction you put into QuickBooks isn't showing up, make sure it hasn't been reconciled yet, that you're using the same bank account as intended, that it hasn't been matched to another bank-downloaded transaction previously, and that it doesn't fall outside of the shown date range.

Moreover, review and categorize the downloaded transactions before adding them if you haven't already manually entered transactions. Take these actions:

1. Go to the Banking menu.
2. ​Under the For Review tab, select the transaction row to review the type of transaction.
3. Choose a category from the Category dropdown button
4. If you have VAT turned on, select the VAT amount from the VAT dropdown.
5. Click Add to move the transaction from the Categorised tab to the In QuickBooks tab.

For more details, read this article: Add and match downloaded bank transactions [Video].

You can also unmatch downloaded bank transactions or move them to another account.

Please touch base with me here if you need further assistance with your transactions. The Community space is always around to provide instructions. Keep safe.