Form SA1 Registering for Self Assessment and getting a tax return 2026

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  1. Click ‘Get Form’ to open it in the editor.
  2. Begin by filling out your personal details in the 'About You' section. Use capital letters as instructed, and ensure you provide your title, date of birth, surname, first name(s), and National Insurance number.
  3. Indicate if you have a previous Unique Taxpayer Reference (UTR) if applicable. This is crucial for those who have been within Self Assessment before.
  4. In the 'Why do you need to complete a tax return?' section, tick the relevant boxes that apply to your situation and enter the corresponding dates. Make sure to include any other reasons in the space provided.
  5. Finally, sign and date the declaration at the end of the form, confirming that all information is accurate. Review your entries for completeness before submitting.

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Self-employed persons, including direct sellers, report their income on Schedule C (Form 1040), Profit or Loss from Business (Sole Proprietorship). Use Schedule SE (Form 1040), Self-Employment Tax if the net earnings from self-employment are $400 or more.
The most common tax deductions for independent contractors include: Home office expenses. Rent or lease payments. Business-related travel, meals and entertainment. Commissions and fees. Advertising and promotion. Business Insurance. Business licenses. Contract labor.
Youll get your UTR by post 15 days after you register.
How do I file my annual return? To file your annual income tax return, you will need to use Schedule C (Form 1040), Profit or Loss from Business (Sole Proprietorship), to report any income or loss from a business you operated or profession you practiced as a sole proprietor, or gig work performed.
Who files a Schedule C tax form? Youll need to file a Schedule C if you earn income through self-employment as a sole proprietor or as a single-member Limited Liability Company (LLC). You wouldnt use a Schedule C to report business income and expenses of a C Corporation or S corporation.

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