Lam345

I am employed and pay tax through PAYE, I also have to complete a tax return as I am a higher rate tax payer and claim child benefit. Do I have to declare any savings interest on my tax return? As I thought, as I also pay through PAYE that any tax required on this would be collected this way automatically also through my tax code being amended, so if I declare it on my tax return would this not been I would pay twice?