![HMRC tax allowance perk worth £1494 that can be backdated missed by thousands of couples](https://cdn.newsserve.net/ONPglobe256.png)
HMRC tax allowance perk worth £1494 that can be backdated missed by thousands of couples
Married couples or those in a civil partnership can boost their tax-free Personal Allowance by claiming Marriage Allowance - but many are unaware of the tax break.
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