Knowledge Base Self-Assessment
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Cumulative Updates
What is a Cumulative Update? A Cumulative Update is a summary of all your income and expenses so far in a given tax year — not just what’s changed since the last time you submitted. Instead of sending only the new inform… |
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1 | 29 | 16 May 2025 |
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Self-Assessment Workflow
The Self-Assessment Workflow is a centralised area in QuickFile for managing all aspects of Income Tax and Self-Assessment. The Workflow charts out the self-assessment journey from start to finish for any given tax year … |
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1 | 41 | 16 May 2025 |
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Making Tax Digital (MTD) for Income Tax: A Guide for Existing Users
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0 | 101 | 6 January 2026 |
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MTD ITSA - Agent Onboarding
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2 | 57 | 10 July 2025 |
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Joining the Making Tax Digital (MTD) for Income Tax and Self Assessment Pilot Scheme
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0 | 92 | 7 May 2025 |
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Cumulative Update Mapping Rules
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2 | 5 | 9 April 2026 |
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Final Declaration
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0 | 22 | 18 May 2025 |
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Business Income Source Summary (BISS)
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0 | 7 | 18 May 2025 |
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Trading Losses and Loss Claims
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0 | 24 | 17 May 2025 |
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Business Source Summary Adjustments (BSAS)
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0 | 24 | 16 May 2025 |
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Request a Tax Calculation
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0 | 12 | 16 May 2025 |
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Checking your Self Assessment Obligations
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0 | 5 | 16 May 2025 |
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Cumulative Update - Self Employment Reporting Categories
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0 | 13 | 15 May 2025 |
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Using Calendar Quarters for MTD ITSA (2026/27 Onwards)
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0 | 19 | 16 May 2025 |
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Check your Self-Assessment Business Details
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0 | 8 | 16 May 2025 |
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Prepare and Submit a Cumulative Update
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0 | 12 | 15 May 2025 |
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Configuring your Cumulative Update Nominal Mappings
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0 | 10 | 15 May 2025 |
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Cumulative Update - UK Property Reporting Categories
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0 | 7 | 15 May 2025 |