# Taxfile: Tax advice \& accounting services for South London businesses \& SMEs

> Accountants \& tax advisors in South London \(Tulse Hill, SE21\): accountancy help \(tax returns, VAT, rebates, refunds, PAYE, bookkeeping, etc\.\)\. For self\-employed, landlords, limited companies, taxi drivers, construction workers \.\.\.

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## Pages
- [contact us](https://www.taxfile.co.uk/contact-taxfile-london/)
- [tax for holiday lets](https://www.taxfile.co.uk/tax-for-holiday-lets/)
- [meet the team](https://www.taxfile.co.uk/meet-the-team/)
- [tax blog](https://www.taxfile.co.uk/blog/)
- [ADWORDS LANDING PAGE \- CIS Tax Refunds](https://www.taxfile.co.uk/cis-tax-rebates/)

## Posts
- [Taxfile Sponsors Movie at the Herne Hill Free Film Festival \(HHFFF\) 2026](https://www.taxfile.co.uk/2026/04/taxfile-sponsors-movie-at-herne-hill-free-film-festival/): \<img class="alignnone wp\-image\-9511 size\-full" title="Taxfile Sponsors Movie for the Herne Hill Free Film Festival \(HHFFF\) 2026" src="https://www\.taxfile\.co\.uk/wp\-content/uploads/2026/04/HHFFF\-main\-image\.jpg" alt="Taxfile Sponsors Movie for the Herne Hill Free Film Festival \(HHFFF\) 2026" width="894" height="600" /\>

Taxfile is delighted to be a part of the \<em\>Herne Hill Free Film Festival\</em\> \(HHFFF\) this year\. This wonderful movie festival takes place from 27 April to 22 May 2026 and is a fabulous opportunity for local residents to enjoy free entertainment across various locations in the area\. With 15 feature films, a short film night, a film quiz, and a 48\-hour film challenge, there really is something for everyone\. What's more, there is no need to buy\* or book tickets — simply turn up at the appropriate time and venue, and enjoy\!
- [Information You Need to Supply for Professional Help with Your Tax Return](https://www.taxfile.co.uk/2025/11/information-needed-for-professional-help-with-tax-returns/): \<img class="alignnone wp\-image\-7573 size\-full" title="Information You Need to Supply for Professional Help with Your Tax Return" src="https://www\.taxfile\.co\.uk/wp\-content/uploads/2024/01/SA\-whats\-needed\.jpg" alt="Information You Need to Supply for Professional Help with Your Tax Return" width="894" height="600" /\>

\<em\>\[Updated November 2025\]:\</em\> If you're self\-employed in the UK and earn more than £1,000 after allowable deductions, you need to file a self\-assessment tax return each year\. It's not only the self\-employed, though\. If you are on a higher income\* or receive untaxed income from things like property rental, tips, commission, savings, investments, dividends, or foreign income, you also have to submit a return\. Partners in business partnerships and those who made a capital gain resulting in Capital Gains Tax \(CGT\) also need to submit a return\.

If you do have to fill in a self\-assessment tax return, getting all the tax return fields filled in properly and the figures right can sometimes be difficult\. That's where professional help from companies like Taxfile is worth its weight in gold\. But what information will your accountant or tax advisor need from you? In today's guide, we'll explain exactly what you'll need to supply\.
- [Transitioning to \<em\>Making Tax Digital \(MTD\) for Income Tax\</em\> – This April](https://www.taxfile.co.uk/transition-to-making-tax-digital-for-income-tax/): \<img class="alignnone wp\-image\-9423 size\-full" title="Transitioning to Making Tax Digital \(MTD\) for Income Tax This April" src="https://www\.taxfile\.co\.uk/wp\-content/uploads/2026/03/MTD\-for\-Income\-Tax\.jpg" alt="Transitioning to Making Tax Digital \(MTD\) for Income Tax This April" width="894" height="600" /\>

\<strong\>IMPORTANT: \<em\>Making Tax Digital \(MTD\) for Income Tax\</em\> officially takes effect from the beginning of April 2026\.\</strong\> If you are self\-employed, a sole trader, or receive income from property, it's likely that \<strong\>this will affect you\</strong\>\. Today's guide outlines key dates, the changes, who they affect, how complying with MTD will impact your business — and how Taxfile can help new and existing clients transition quickly and easily\.
- [Missed the Tax Return Deadline? What Happens Now?](https://www.taxfile.co.uk/2026/02/missed-tax-return-deadline-what-happens-now/): \<img class="alignnone wp\-image\-7124 size\-full" title="Missed the Tax Return Deadline? What Happens Now?" src="https://www\.taxfile\.co\.uk/wp\-content/uploads/2023/02/Tax\-return\-overdue\.jpg" alt="Missed the Tax Return Deadline? What Happens Now?" width="894" height="443" /\>

\<em\>\[Updated 1 February 2026\]:\</em\> If you missed the 31 January deadline to \<strong\>\<a href="https://www\.taxfile\.co\.uk/tax\-returns/"\>submit your self\-assessment tax return\</a\>\</strong\>, you are now into the \<em\>penalty\</em\> stage\. HMRC applies an automatic £100 penalty to those who are anywhere from 1 day to 3 months late\. \<strong\>\<a href="https://www\.gov\.uk/self\-assessment\-tax\-returns/penalties" target="\_blank" rel="noopener"\>Further penalties\</a\>\</strong\> are then added if you take even longer to comply\. It's even worse if you haven't paid the \<em\>tax\</em\> owed to HMRC by 31 January because you'll then owe interest on that too\. Here's our professional advice of what to do if you're late\.\.\.

## Categories
- [Tax](https://www.taxfile.co.uk/category/tax/)
- [HMRC](https://www.taxfile.co.uk/category/hmrc/)
- [Accountancy](https://www.taxfile.co.uk/category/accountancy/)
- [Accountants](https://www.taxfile.co.uk/category/accountants/)
- [South London](https://www.taxfile.co.uk/category/south-london/)

## Tags
- [south london](https://www.taxfile.co.uk/tag/south-london/)
- [tulse hill](https://www.taxfile.co.uk/tag/tulse-hill-2/)
- [accountancy](https://www.taxfile.co.uk/tag/accountancy/)
- [tax](https://www.taxfile.co.uk/tag/tax/)
- [accountants](https://www.taxfile.co.uk/tag/accountants/)

## Optional
- [Sitemap index](https://www.taxfile.co.uk/sitemap_index.xml)