CA Inter Taxation Mock Test: One Paper, Two Tax Systems, One Preparation Strategy That Covers Both

Paper 3 of the CA Intermediate Group 1 has a characteristic that makes it distinctly different from every other paper in the CA Intermediate syllabus. It requires proficiency in two entirely separate bodies of tax law within a single three-hour examination.

Income Tax and Goods and Services Tax operate on different legal frameworks, use different computation formats, test different analytical skills, and have different amendment cycles. Scoring well in both requires a preparation strategy that recognizes this difference and addresses each component on its own terms before combining them in practice.

This guide focuses entirely on how to use the CA inter taxation mock test to build exam-ready proficiency across both the Income Tax and GST components of Paper 3, covering what each part demands, where marks disappear, and how to integrate both into a complete preparation cycle.

Paper 3: The Income Tax and GST Split

Paper 3, Taxation, is a 100-mark, three-hour, fully subjective paper under CA Intermediate Group 1. The marks split is approximately:

• Part 1: Income Tax Laws: 60 marks
• Part 2: GST (Goods and Services Tax): 40 marks

Both components require handwritten answers. Both are amendment-sensitive, reflecting provisions applicable to the specific exam attempt. Both carry their own answer format expectations.

Part 1: Income Tax Laws at CA Intermediate Level

What the Income Tax Component Tests

Residential Status:

• Resident, non-resident, and resident but not ordinarily resident determination
• Rules for individuals under Section 6 and their year-wise application
• Scope of total income for each residential status category

Heads of Income:

Income from Salaries:

• Allowances: taxable, exempt, and partially exempt with applicable conditions
• Perquisites: types and valuation under income tax rules
• Profits instead of salary: scope and computation

Income from House Property:

• Annual value determination for self-occupied and let-out properties
• Deductions under Section 24: standard deduction and interest on housing loan
• Treatment of arrears of rent and unrealised rent

Business and Professional Income:

• Deductible and non-deductible expenses
• Depreciation computation under the block of assets method
• Disallowances under Sections 40, 40A, and 43B

Capital Gains:

• Short-term versus long-term classification based on holding period by asset type
• Cost of acquisition, cost of improvement, and indexed cost computation
• Exemptions under Sections 54, 54EC, and 54F with conditions

Income from Other Sources:

• Dividend income, interest, and other residual income
• Taxability of gifts under Section 56(2)

Deductions Under Chapter VI-A:

• Section 80C aggregate limit and eligible investments
• Section 80D health insurance deduction conditions
• Section 80G donation deductions and applicable percentage

Set-Off and Carry Forward:

• Inter-source set-off within the same head
• Inter-head set-off rules and restrictions
• Loss carry-forward periods by income type

TDS Provisions:

• Section-wise TDS thresholds, rates, and applicable payment types
• TDS deduction and deposit timelines
• Consequences of non-deduction and non-deposit

Part 2: GST at CA Intermediate Level

What are the GST Component Tests

Framework and Concept:

• Structure of GST: CGST, SGST, and IGST and their legal basis
• Taxable event: supply under Section 7 of the CGST Act
• Schedule I, II, and III categories

Registration:

• Aggregate turnover threshold and its computation
• Mandatory versus voluntary registration
• Composition scheme: eligibility, conditions, and restrictions

Supply and Taxability:

• Composite supply and mixed supply: identification and tax treatment
• Reverse charge mechanism: categories and applicability
• Inter-state versus intra-state supply determination

Place of Supply:

• Default place-of-supply rule for services
• Specific rules for goods supply scenarios
• Consequence for IGST versus CGST-SGST applicability

Input Tax Credit:

• Conditions for ITC eligibility under Section 16
• Blocked credits under Section 17(5)
• Time limit for claiming ITC

Tax Invoice and Returns:

• Mandatory particulars in a tax invoice
• Time of supply for goods and services
• Overview of GSTR-1 and GSTR-3B

Where Marks Are Lost in CA Inter Paper 3

Income Tax: Computation Format Deviations

Each head of income has a prescribed computation format. Net salary computation, annual value calculation, and capital gains work each follow a specific structure. Students who arrive at the correct total using a non-standard layout lose presentation marks even when the mathematics is correct.

Income Tax: Section References Strengthen Every Answer

At the CA Intermediate level, examiners expect section references for deductions, exemptions, and disallowances. Stating that interest on a housing loan is deductible is less complete than citing Section 24(b) with the applicable limit.

GST: Place of Supply Errors Are High-Risk

Under time pressure, students apply the default place-of-supply rule when a specific rule applies, or apply a rule meant for services to a goods supply. This produces an incorrect inter-state versus intra-state determination and, consequently, a wrong tax type is applied. The entire question can be lost from a single early place-of-supply error.

GST: ITC Eligibility Answers Need the Legal Basis

Stating whether ITC is eligible or blocked without citing the applicable subsection of Section 17(5) loses the legal-basis marks. Both the conclusion and its legal foundation are part of the expected answer.

Building Your CA Inter Taxation Mock Test Schedule

Weeks 1 to 4: Income Tax topic-wise study and testing Complete each head of income topic individually. After each topic, practice computation problems independently before checking solutions. Focus on format compliance and section referencing from the first attempt.

Weeks 4 to 6: GST topic-wise study and testing Complete supply, place of supply, and ITC as your first priority. These three areas carry the most GST marks. Practice identifying the correct place-of-supply rule across different scenario types.

Weeks 6 to 8: Component-level mock tests with evaluation Run a 60-mark Income Tax test and a 40-mark GST test separately. Submit each for professional evaluation.

Income Tax feedback: computation format, section referencing, head-wise structure. GST feedback: place-of-supply rule accuracy, ITC eligibility reasoning, provision citation.

Weeks 8 to 10: Full Paper 3 simulations Combine both components in a three-hour Paper 3 simulation. Practice managing the transition from Income Tax computation mode to GST application mode within the same sitting.

For CA inter taxation mock tests with expert evaluation covering both Income Tax and GST components, CA Test Series offers paper-wise plans for CA Intermediate Paper 3 as part of its Group 1 options. View CA Intermediate Group 1 plans here.

Confirm Paper 3 Taxation coverage before enrolling through the test series syllabus page.

CMA Intermediate students studying Direct and Indirect Taxation in their own program alongside CA Inter Paper 3 can access CMA Test Series for June 2026 for parallel CMA-level tax practice.

CS Executive students preparing Tax Laws from the Company Secretary module perspective can find structured CS practice at CS Test Series for June 2026.

Students building foundational tax and commerce awareness at the Foundation level can access CA Foundation video lectures and books for entry-level subject support.