Digital Self-Assessment Tax Return
in London
Professional self-assessment tax return preparation and filing for UK contractors, freelancers, landlords, and
self-employed individuals. Accurate, deadline-safe, and fixed-fee.
Who This Service Is For
Self-assessment is required for anyone who is self-employed (sole trader or partner), a company director, a landlord receiving rental income, a higher-rate taxpayer with investment or dividend income, or anyone earning over £100,000 in a tax year. We also file for individuals with foreign income, capital gains disposals, or complex benefit-in-kind arrangements.
What's Included with Our Digital Self-Assessment Service?
- WHY TDA
Why Choose TDA
FAQ
Frequently Asked Questions
You need to file a self assessment if you are: self-employed with income over £1,000 in a tax year; a company director (unless HMRC specifically tells you otherwise); a landlord receiving rental income; a higher or additional rate taxpayer with untaxed income (dividends, savings, rental); someone who earned over £100,000 in the tax year; or someone who received income from abroad. HMRC can also require you to file even if you are employed, if your tax affairs are complex.
The key self-assessment deadlines are: 5 October — you must register for self-assessment if you are new to it; 31 October — paper return deadline; 31 January — online return filing deadline AND payment of any tax due for the previous tax year AND first payment on account for the current year. Missing the 31 January deadline results in an automatic £100 penalty, with further penalties accruing over time.
Allowable expenses depend on your income source. For self-employed individuals: business travel, home office costs, professional subscriptions, equipment, marketing, accountancy fees, and training directly related to your trade. For landlords: letting agent fees, repairs and maintenance, insurance, mortgage interest (restricted to 20% basic rate relief), ground rent, and service charges. We review your specific situation to ensure nothing legitimate is missed.
Payments on account are advance payments toward your next year’s self-assessment tax bill. HMRC requires them if your last tax bill exceeded £1,000 and less than 80% was deducted at source. Two payments are required — by 31 January and 31 July — each being 50% of the previous year’s tax liability. We calculate your payments on account, explain them clearly, and ensure you budget for the due dates.
If you miss the 31 January online filing deadline: an automatic £100 penalty is issued immediately; if more than 3 months late, daily penalties of £10 per day apply (up to £900); if more than 6 months late, a further penalty of 5% of the tax due or £300 (whichever is greater); if more than 12 months late, a further 5% or £300 penalty applies. Interest also accrues on unpaid tax from 1 February. We ensure you never reach any of these thresholds.