Self-Assessment Software

Award-winning Self-Assessment tax software that accelerates you through your business’ or clients’ tax returns.

BTC SA Solution


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Our highly popular product

Our highly popular, user-friendly self-assessment tax return software has been designed specifically for accounting, finance and tax professionals who prepare multiple tax returns for UK Individuals, Partners and Trusts.

The Self-Assessment software is highly affordable and enables you to complete Individual, Partnership and Trust tax returns (including the previous three years that can be filed online.)

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What do previous
customers say about us?

BTCSoftware customers say they like our Self-Assessment tax software’s intuitive layout with context-sensitive HMRC guidance notes and the fact that all returns are validated before submission to reduce errors. The tax return software also includes a built-in task reminder system to reduce the risk of late penalties and the ability to lock individual returns to prevent accidental errors.

Data is simple to retrieve and review on-screen, and you can easily attach PDF files to a return. Reports generated by the software give a clear summary of all the data on the return.

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Key Features

Create Tax Returns with online filing

Individual (SA100), Partnership (SA800), and Trust (SA900) Tax Returns, including Scottish rates

Easy integrations

Two-way integrations with many bookkeeping providers save you effort

Link Partners with Partnerships

Automatic link between Partners (SA100 and SA900) and Partnership (SA800) Tax Returns

Capital Allowance Calculator

Built-in and comprehensive Capital Allowance Calculator

Save time

Auto-complete dates feature saves on data entry work

Fee-earner allocation

Allocate fees per client to track and maintain fee earner responsibility

HMRC integration

Pre-populate individual tax returns with data already known by HMRC

Built-in reminders

Reminder system to avoid the risk of late penalties

Easy to install &
free unlimited technical support

SA Solution Self-Assessment tax software is simple to install for network or standalone installations and is also available in a cloud-based option.

Installation includes:

  • Simple install pack for network or standalone installations
  • Cloud installation via our technical team
  • Useful quick-start videos
  • Simple transfer of standing data
  • Easy to follow user guide
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Purchase Options

Annual product licences include unlimited support, together with free software updates.

Want a free trial

Self-Assessment is part of our Solution Suite. You can trial our Solution Suite free of charge for 7 days! Simply click below to sign up.

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BTC SA Solution

SA Solution 30


30 Returns

All Features Listed Above

Annual Licence

Full UK Support

1 User

BTC SA Solution

SA Solution


Unlimited Returns

All Features Listed Above

Annual Licence

Full UK Support

10 Users

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