The new tax year started yesterday i.e., 06/04/2022 and therefore, if you are employed or a pensioner, your employer and/or pension income provider will shortly, if they have not already be issuing you with your Tax Yer End summary of pay and tax deductions for tax year 2021/22. The deadline for issuing P60s is the 31st May after the end of the tax year.
Employers do make mistakes as does HMRC with tax codes, so please do check them for accuracy. If you are not sure or do not know where to start, HMRC has two very handy calculator tools to help you do this:
To estimate your expected tax deductions for the new tax year 2022/23 use:
https://www.gov.uk/estimate-income-tax
To check your pay and tax deductions for the tax year just finished 2021/22 use:
https://www.gov.uk/check-income-tax
Claiming work related expenses
Many employers refund business related expenses but there are many that do not cover all your business, employment, self employed and work related expenses. For example:
Self-employed expenses see: https://www.gov.uk/expenses-if-youre-self-employed
Employed work related expenses see: https://www.gov.uk/tax-relief-for-employees