Cutting tax two ways

MrsStepford

The first is to check Check if you can claim flat rate expenses for uniforms, work clothing and tools - GOV.UK (www.gov.uk) 
If employer pays you mileage to cover fuel, but doesn't pay the rate which HMRC allows, you can claim the difference. You'll have to be organised and keep receipts (take a photo before the ink on the receipt fades) and if paying by debit card, underline the card transactions when your statement arrives)

Tax thresholds have been frozen, so more people will be dragged into 40% tax,over time. If part of your salary gets taxed at 40% you can sign up for Gift Aid to give the charity an extra 25% and also sign up to get a refund of £25 for every £100 of your stuff they sell from HMRC. Same goes for any donations. You can't get this if you are unemployed, retired, on benefits. 

If employer provides uniform but you have to wash it at home, there's a flat rate allowance. Some employers have negotated this with HMRC and you get it already, others haven't and you will have to claim it yourself, see link. and ask HR or People. 

If you have to pay out for professional registrations and you don't get reimbursed for them by employer, you can claim back a percentage from HMRC if they are on the HMRC list. Also if they arejust helpful for your job. Doesn't matter if it's £150 per year or £22 you get a % back depending on your tax band. 

If you are working from home as a self-employed person, you should be able to claim heating and lighting for one room and for training you pay for yourself.

Dazed_and_C0nfused

If part of your salary gets taxed at 40% you can sign up for Gift Aid to give the charity an extra 25% and also sign up to get a refund of £25 for every £100 of your stuff they sell from HMRC. Same goes for any donations. You can't get this if you are unemployed, retired, on benefits. 

Says who?

And receipts for what? 

If employer pays you mileage to cover fuel, but doesn't pay the rate which HMRC allows, you can claim the difference. You'll have to be organised and keep receipts (take a photo before the ink on the receipt fades) and if paying by debit card, underline the card transactions when your statement arrives)

badmemory

If you pay tax, retired or not, the charity can get the extra.  That is why they ask you when donating if you pay tax & if you will give them some basic personal details.  They don't ask if you are retired as it is irrelevant & frankly often obvious.