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# What document do I need to deduct my voluntary social security contributions?

To be able to deduct your voluntary social security contributions on your tax return, you must attach an official certificate issued by the CCSS. This certificate summarises the amount of contributions actually paid during the tax year.



![CCSS](https://storage.crisp.chat/users/helpdesk/website/-/1/c/5/f/1c5fc819171ffd00/ccss-cotisations-volontaires-1_wfxyjn.png =500x713)