In VAT4U, you can save a VAT claim as a Draft before approving it. Once approved, the claim status will change to Queued. 
1. Open Your VAT Claim
Go to the main menu and select VAT Recovery > Manage VAT Claims. Choose the claim ID you want to verify and approve.
2. Verify Your VAT Claim
Open the claim in Draft status. Check that the claim’s content is correct. Open individual invoices to verify details if necessary.
3. Approve Your VAT Claim
When everything is correct, tick the box that says "I have downloaded and verified the claim details". Click the Approve button. 

The claim will then be approved, and its status will change to Queued.