Self Assessment Help Guide

This section covers all the features within the Capium Self Assessment (includes SA100, SA800 & SA900) module in detail, broken down into sections

Basis Reform: SA800 - Adding an Additional Period
The article below will guide you how to add additional periods beyond the 12 month period in SA 800.  Additional Trading and Professional Income Page...
Fri, 20 Sep, 2024 at 4:37 PM
Self-Assessment Questionnaire
Capium's Self-Assessment module now features the Self-Assessment Questionnaire, designed to streamline the process of collecting vital information from...
Fri, 11 Apr, 2025 at 5:04 PM
How to Run an MTD IT Report
Navigation: Self Assessment > MTD IT Income Report Once in this section, chose the Tax Year in the drop down available and click 'Do...
Thu, 27 Mar, 2025 at 3:37 PM
Capital Gains Calculator - Post Budget (30 October 2024)
For disposals of assets other than residential property or carried interest made on or after 30 October 2024, the Capital Gains Tax (CGT) rates have incr...
Fri, 6 Jun, 2025 at 12:09 PM
How To Modify Tax summary document
Title: How to Modify the Tax Summary Document in Self Assessment The Tax Summary document in Self Assessment is an important document that provides a su...
Tue, 21 Oct, 2025 at 12:33 PM
Error - Must Enter Nominated Partner Name/Signatory Name
If you are receiving the error message 'Must Enter Nominated Partner Name/Signatory Name' while submitting the S800, please follow the steps outline...
Wed, 22 Oct, 2025 at 4:32 PM
SEIS: Seed Enterprise Investment Scheme
To incorporate the SEIS information into your tax return, please adhere to the following steps: 1. You will need to add the Supplementary page - Additio...
Wed, 22 Oct, 2025 at 3:47 PM
Submission must contain at least one attachment or an entry in the whitespace if Capital Gains Summary is present.
If you are encountering the error 'Submission must contain at least one attachment or an entry in the whitespace if Capital Gains Summary is present....
Wed, 22 Oct, 2025 at 3:40 PM
Foster Care Relief
Hello and thank you for reaching out to us regarding the Self-employment short supplementary page for foster carers. We understand that navigating tax forms...
Tue, 21 Oct, 2025 at 12:45 PM