Claiming security deposits

I'm looking to understand all things relating to claiming security deposits paid earlier at the time of import. The original reasons for import vary: - inward processing by customs declaration, - temporary admissions by customs declaration, and - quota claims. Are there any links anyone can signpost me to please? Thank you

Hi, 
You can claim for repayment if you’ve overpaid import duty and VAT. In some cases you may also be able to claim if you’ve overpaid VAT or excise duty. 
Please see the following guidance for more information.
How to claim a repayment of import duty and VAT if you've overpaid 
Thank you 

Thank you but my query is not about overpayments but about security deposits.

Hi rabbitinheadlights confused,
Apologies for misunderstanding, the process you follow for claiming deposits depends on the type of declaration. A Bill of Discharge will be submitted to National Imports Relief Unit for the Inward Processing Relief ones.
Discharging your goods when using authorisation by declaration
For Temporary Admissions you would contact National Temporary Admissions team at: ntis@hmrc.gov.uk directly. 
For quotas, it will be either NDRC via a c285 or NIDAC (customsaccountingrepayments@hmrc.gov.uk) depending if its been brought to account or not. 
Thank you.

Thank you HMRC Admin 21. Much appreciated.