R43m sed 2026

1. Click ‘Get Form’ to open the r43m sed in the editor.
2. Begin by filling in your personal details. Enter your title, surname, first name, and date of birth using capital letters.
3. Provide information about your employment history during the claim period. List each employer's name and address, along with your National Insurance number.
4. In the 'Details of your claim' section, specify the tax year for which you are claiming and enter your pay and UK tax deducted.
5. Document your periods spent in the UK by entering dates for voyages between UK ports and any other relevant duties performed within UK territorial waters.
6. Indicate how you would like your repayment made—either to yourself or a nominee—and provide their details if applicable.
7. Attach all necessary supporting documents as indicated on the form, ensuring you check each box to confirm inclusion.
8. Complete the repayment claim declaration by signing and dating the form before sending it to HM Revenue & Customs.

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