S-Corp Masterclass · Reference Tool
Entity Schedule Reference
Form 1120 · Form 1120-S · Form 1065 · Tax Year 2025
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What type of entity are you filing for?
Form 1120
C CorporationRequired Schedules
Schedule C
Unique
Dividends, Inclusions & Special Deductions
Schedule J
Unique
Tax Computation & Payments / Credits
Schedule K
Business / Shareholder Info + Questionnaire (8879)
Schedule L
All 3 Entities
Balance Sheet per Books
Schedule M-1 & M-2
All 3 Entities
Book to Tax & Retained Earnings
Form 1125-A
All 3 Entities
Cost of Goods Sold (COGS) — if applicable
Key Notes
⚡ ONLY Form 1120 has Schedule C (Dividends & Inclusions)
📋 Schedule J is SIMILAR to Schedule K on Form 1065 & 1120-S
📌 Schedule K on Form 1120 ≈ Schedule B on Form 1065 & 1120-S
Form 1120-S
S CorporationRequired Schedules
Schedule B
Business / Shareholder Info + Questionnaire (8879)
Schedule K
Charity, Credits (Sch E, Sch F) — pass-through to shareholders via K-1
Schedule L
All 3 Entities
Balance Sheet per Books
Schedule M-1 & M-2
All 3 Entities
Book to Tax & Retained Earnings
Form 1125-A
All 3 Entities
Cost of Goods Sold (COGS) — if applicable
Key Notes
✅ Same schedule structure as Form 1065
🚫 No Schedule C — S-Corps are pass-through entities (no dividends deduction)
📋 Schedule B here ≈ Schedule K on Form 1120
Form 1065
PartnershipRequired Schedules
Schedule B
Business / Shareholder Info + Questionnaire (8879)
Schedule K
Charity, Credits (Sch E, Sch F) — pass-through to partners via K-1
Schedule L
All 3 Entities
Balance Sheet per Books
Schedule M-1 & M-2
All 3 Entities
Book to Tax & Retained Earnings
Form 1125-A
All 3 Entities
Cost of Goods Sold (COGS) — if applicable
Key Notes
✅ Same schedule structure as Form 1120-S
🚫 No Schedule C — Partnerships are pass-through entities
📋 Schedule B here ≈ Schedule K on Form 1120
| Schedule | Form 1120C Corporation | Form 1120-SS Corporation | Form 1065Partnership |
|---|---|---|---|
|
Schedule B Differs
Business/Shareholder Info + Questionnaire (8879)
|
≈ Called Sch K on Form 1120 |
✓ |
✓ |
|
Schedule C Differs
Dividends, Inclusions & Special Deductions
|
✓ Unique to C Corporations |
— |
— |
|
Schedule J Differs
Tax Computation & Payments / Credits
|
✓ Similar to Sch K on 1065 & 1120-S |
≈ See Sch K |
≈ See Sch K |
|
Schedule K Differs
Pass-through items: Charity, Credits (Sch E, F)
|
◈ Info/disclosures only (≈ Sch B on 1065/1120-S) |
✓ Pass-through to shareholders via K-1 |
✓ Pass-through to partners via K-1 |
|
Schedule L All 3
Balance Sheet per Books
|
✓ |
✓ |
✓ |
|
Schedule M-1 All 3
Reconciliation: Book Income vs. Tax Return
|
✓ M-3 required if assets ≥ $10M |
✓ M-3 required if assets ≥ $10M |
✓ M-3 required if assets ≥ $10M |
|
Schedule M-2 All 3
Analysis of Unappropriated Retained Earnings
|
✓ |
✓ |
✓ |
|
Form 1125-A All 3
Cost of Goods Sold (COGS)
|
✓ If applicable |
✓ If applicable |
✓ If applicable |
Legend:
Required
Not Applicable
Equivalent (different name)
Present but different purpose
Key Notes for Students
1. Form 1065 & Form 1120-S have the same schedule structure.
2. Schedules L, M-1, M-2 and Form 1125-A appear on all 3 entities.
3. Form 1120's Schedule K = Form 1065 & 1120-S's Schedule B (business info).
4. Form 1120's Schedule J is SIMILAR to Form 1065 & 1120-S's Schedule K.
5. ONLY Form 1120 (C-Corporation) has Schedule C for Dividends & Inclusions.