If you need a replacement P45 in the UK, you can follow these steps to obtain one:
Contact your previous employer: The first step is to get in touch with your most recent employer from whom you received the P45. Request a replacement copy of your P45, explaining why you need it. Employers are legally required to provide a P45 to employees upon leaving their job, so they should be able to assist you with obtaining a replacement.
Check your online tax account: If you have a personal tax account with HM Revenue and Customs (HMRC), you may be able to access your P45 information online. Log in to your account and look for any tax documents related to your previous employments, including P45s. Order Replacement P45 UK
Contact HM Revenue and Customs (HMRC): If you are unable to obtain a replacement P45 from your former employer and you don't have access to your online tax account, you can contact HMRC and request a replacement. To do this, you'll need to provide your National Insurance number and details about your previous employment, such as the name and address of your former employer and the dates of your employment.
Complete a Starter Checklist (P46): If you haven't received a P45 from your previous employer and cannot obtain a replacement, your new employer may ask you to complete a Starter Checklist (previously known as a P46 form). The Starter Checklist provides essential tax information to your new employer and helps them determine the correct tax code to apply to your new job.
Keep a record: Once you receive a replacement P45 or complete a Starter Checklist, keep a copy for your records. P45s are important documents that may be required for various purposes, such as when completing a tax return or dealing with financial matters.
Remember to promptly inform your new employer if you obtain a replacement P45 or complete a Starter Checklist, as they will need this information to set up your payroll and ensure accurate tax deductions on your new job. If you have any concerns or questions regarding your P45 or tax-related matters, you can seek guidance from HMRC or a tax professional for personalized assistance.