Official form guide
Form IT38: Form IT38S
Form IT38S is an Irish tax form issued by the Revenue Commissioners. The 'IT' prefix suggests it relates to Income Tax, and the 'S' likely indicates it's a supplementary form.
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Form Overview
Revenue Commissioners - Form IT38: Form IT38S
Form IT38S is an Irish tax form issued by the Revenue Commissioners. The 'IT' prefix suggests it relates to Income Tax, and the 'S' likely indicates it's a supplementary form.
Risk Radar
Scan points- 1Using an outdated version of the form is a common mistake that can lead to processing delays.
- 2Incorrect income figures leading to under or over payment of tax
- 3Missing signatures or required declarations
- 4Using an outdated version of the form
- 5Failing to include necessary supporting documentation
Plain English
This is an Irish tax form from the tax authority. If you're dealing with Irish income taxes and need to provide additional information or corrections, this supplementary form might be relevant.
Submission Date
- Filing date: Supplementary tax declarations generally have deadlines 4 weeks after the initial filing deadline or when the change occurs, whichever is later.
- Preparation window: collect IDs, supporting records, and signatures in advance.
- Final review: verify names, dates, and required fields before submission.
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What this form is for
- Use for supplementary income declarations after your initial tax return
- Use for correcting errors in previously filed tax returns
- Use when reporting additional income not initially declared
- Not for initial tax returns - use the main IT form instead
- Not for VAT matters - use VAT-specific forms
Form selector
Use this form or another form?
Initial income tax return
First-time declaration requires the primary form
✓ Check if you're filing for the first time
VAT reporting
Different tax type with separate rules
✓ Confirm you're dealing with income tax, not VAT
Corporation tax
Different tax for companies vs individuals
✓ Verify if you're filing as an individual or company
Capital gains tax
Specific tax for asset sales
✓ Check if your income is from employment or asset sales
Deadline or filing window
Supplementary tax declarations generally have deadlines 4 weeks after the initial filing deadline or when the change occurs, whichever is later.
Before you submit
- 1Complete all sections relevant to your situation
- 2Double-check calculations and personal details
- 3Sign and date the form if required
- 4Include any necessary supporting documents
- 5Keep a copy of the submitted form for your records
How to file this form
- 1Obtain the latest version of Form IT38S from Revenue's website
- 2Complete all required sections with accurate information
- 3Calculate any additional tax liability or refund due
- 4Submit through ROS, by post, or in person as appropriate
- 5Keep proof of submission for your records
Known limitations
- 1May not be used for initial tax returns
- 2Cannot be used for VAT matters
- 3Processing times may vary depending on submission method
- 4May require additional documentation for complex cases
Field map
Compact field-by-field guide
Identity
3 items
Your full name as Revenue holds it.
Your Personal Public Service number — Revenue matches the form to your record with this.
Your current address, including Eircode.
Details
1 items
The year or period the form relates to.
Amounts
1 items
Enter each amount against the heading it belongs to.
Declaration
1 items
Sign to confirm the details are correct and complete.
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Fillable formOpen in Editor->Form versions may be updated annually or when tax rules change. Always check Revenue's website for the most current version before filing.
What changed or needs a fresh check
- Verify the form matches the current tax year
- Check for any recent updates to tax rates or allowances
- Confirm all personal details sections are still required
- Ensure calculation methods haven't changed
Quick Facts
Downloads & source
Sources
- SRCForm name: IT38S
- SRCIssuing agency: Revenue Commissioners (REVENUE)
- SRCForm number: IT38
- SRCPrefix 'IT' suggests relation to Income Tax
- SRCSuffix 'S' likely indicates supplementary form
- SRCSupplementary forms typically used for corrections or additional information
- SRCCan be submitted through Revenue Online Service (ROS)
- SRCNot confirmed in official source for exact requirements or deadlines
Common confusion points
Confusing this form with the main income tax return form
Uncertainty about when supplementary declarations are required
Difficulty determining which sections apply to your situation
Confusion about supporting documentation requirements
Uncertainty about deadlines for supplementary filings
Source transparency
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