Self Assessment Tax Return Accountant UK — Simplr Accounting

Self Assessment,
Made
Simplr.

Online Self Assessment tax return support for UK sole traders, creators, landlords and small business owners.

We prepare and file your tax return, claim allowable expenses, explain what you owe and keep HMRC deadlines under control. Fixed-fee, plain-English and fully online.

01 / Why Simplr

A tax return service for people who want it done properly.

Self Assessment is simple until it suddenly is not. Side income, creator income, rental income, expenses, payments on account and HMRC letters can make the whole thing feel messy. We sort the numbers and explain what matters.

01

Filed accurately

Your return is prepared carefully, checked before submission and filed with HMRC by the deadline.

02

Expenses reviewed

We help identify allowable expenses so you do not miss sensible claims or include costs HMRC could challenge.

03

Plain-English tax advice

We explain your tax bill, payments on account and next steps without jargon or scare tactics.

04

Fully online

Send documents digitally, ask questions online and approve your return remotely. No office visit needed.

05

Creator and small business friendly

We understand sole traders, creators, landlords, online sellers, freelancers and growing small businesses.

06

Fixed fee

You know the cost before we start. No surprise invoice just because January got busy.

02 / What’s included

Everything your Self Assessment needs, handled.

We take your records, prepare your return, review the claims, send you a clear summary and file once you are happy.

/ 01
Tax Return Preparation
We prepare your Self Assessment return using your income records, expenses, statements and supporting information.
/ 02
Allowable Expense Review
We review your costs and help claim expenses that are relevant, reasonable and supportable for your work.
/ 03
HMRC Filing
Once approved, we submit your tax return to HMRC and confirm what has been filed.
/ 04
Tax Bill Explanation
We explain what you owe, when it is due and whether payments on account apply, so there are no nasty surprises.
/ 05
Record Keeping Guidance
We tell you what to keep, how to organise receipts and how to make next year easier.
/ 06
Planning for Next Year
We help you understand what to set aside for tax and whether bookkeeping, VAT or a limited company should be considered.
Do I need to file?

If you earned over
£1,000, check now.

If you earn more than £1,000 in a tax year from self-employment, side income or trading, you usually need to register for Self Assessment.

You may also need to file if you are a landlord, company director, high earner, receive untaxed income, have capital gains, or HMRC has asked you to complete a return.

£1,000
Trading allowance
threshold
5 Oct
Register by
after tax year ends
31 Jan
Online filing
and payment deadline
03 / Who we help

Self Assessment for real businesses, side hustles and creators.

Whether this is your first tax return or you are tired of leaving it until January, we make the process calmer and clearer.

/ 01

Sole traders

For freelancers, consultants, trades, service businesses and anyone running self-employed income through Self Assessment.

/ 02

Creators

For creators, influencers and online earners with platform payouts, brand deals, subscriptions and digital expenses.

/ 03

Landlords

For rental income, property expenses, mortgage interest rules and landlord tax return reporting.

/ 04

Side hustles

For people with extra income who want to get compliant before HMRC catches up.

04 / FAQs

Self Assessment questions, straight answers.

Quick answers before you book a call.

Do I need to file a Self Assessment tax return?
You may need to file if you earn more than £1,000 from self-employment or side income, receive rental income, have untaxed income, make capital gains, or HMRC asks you to submit a return.
What is the Self Assessment deadline?
The online filing and payment deadline is usually 31 January after the end of the tax year. If you need to register for Self Assessment, the registration deadline is usually 5 October after the tax year ends.
What expenses can I claim?
It depends on your work, but common expenses include equipment, software, phone, internet, travel, marketing, subscriptions, accountancy fees and home working costs where they are allowable and business-related.
Can you file my tax return online?
Yes. We work fully online. You send the information digitally, we prepare the return, explain the result and submit it to HMRC after your approval.
What are payments on account?
Payments on account are advance payments towards next year’s tax bill. They can surprise people in their first profitable year, so we explain whether they apply and how much to set aside.
Can you help if I missed a deadline?
Yes. We can help prepare and submit overdue returns, explain likely penalties or interest, and get your tax affairs back under control.
Ready when you are

Let’s make your tax return Simplr.

Free 20-minute discovery call. No pressure, no jargon, just a clear answer on what we can do for you.

Book Free Discovery Call
Chat on WhatsApp