Dave4471

I currently earn a salary above the 40% tax bracket. £54000. I give money to a charity each month so have had my tax code adjusted to claim back some of the girt aid tax. I was advised by a friend I could do this. However, I am also part of a salary sacrifice scheme at work for my pension. I think this may bring me back under the 40% tax bracket. My P60 is showing £49,9665. Should I get back in touch with HMRC to gat my tax code put back as it was or can I still claim back on the money I give to charity? I'm not sure how it's worked out.