Software Terms of Use

Scope: This document applies exclusively to the TCSL VAT Submission System, including its integration with HMRC’s Making Tax Digital services. It does not govern TechCo Systems Ltd’s hosting services or other commercial activities.

TCSL Business Management System — TechCo Systems Ltd
Effective date: 10 November 2026

1. Scope

These terms describe the current use of the TCSL Business Management System, including its separate HMRC VAT submission application. The system is currently operated by TechCo Systems Ltd for its own business administration. It is not currently offered as a publicly available VAT submission service for third parties.

2. Authorised use

Only persons authorised by TechCo Systems Ltd may operate the system or authorise access to HMRC services. Users must use their own authorised HMRC credentials and must not share passwords, authentication codes or other security credentials.

3. HMRC authorisation

HMRC authorisation permits the software to request the VAT information and perform the VAT operations covered by the permissions granted. Users should review the permissions shown by HMRC before granting access. Authorisation does not transfer responsibility for the accuracy of a VAT return to HMRC.

4. Submission and checking

Before submitting a VAT return, the authorised operator is responsible for checking the period, figures and supporting records. Once HMRC accepts a submission, it may not be possible to withdraw or amend it through the software. Submission confirmations are recorded for audit and reconciliation. If a local update fails after HMRC has accepted a return, the operator must reconcile the result before attempting another submission.

5. Security and availability

TechCo maintains appropriate access controls and operational checks. The software depends on local equipment, hosting and HMRC services, which may be unavailable from time to time. Operators must not bypass security controls or use the software without proper authorisation.

6. Data handling

Information is handled as described in the Privacy Policy. OAuth tokens are used in memory during the local submission session and are not retained between executions.

7. Ownership and future availability

The software and associated documentation are maintained by TechCo Systems Ltd. No right to use or redistribute the software is granted to external parties by publication of these terms. If the software is offered to external customers in future, separate or revised terms may apply.

8. Changes and contact

TechCo may update these terms to reflect changes in the software or applicable requirements. Questions about these terms may be sent by post to the company address shown below.