The following articles will help you prepare for the business deadline. Deadlines, e-Filing, and Acks 13325: Return Due Dates and Deadlines 11825: Business Return or Extension – Perfection Period 10847: Form 9325 or EF Notice - Notifying a Taxpayer after IRS Acceptance 11979: Business Returns – Messages 0148 and 0147 Prevent e-Filing Duplicate Extensions and Returns 14113: 1065 - Who Must Sign - Partner/LLC Member, Paid Preparer/ERO PIN 11834: 1120S - Important Facts - Payments, PINs, e-Filing, and Other Functions Extensions 11768: 1065/1120-S - Extension Form 7004 11060: 1120 - Extension Form 7004 Amended Returns 10492: Amended 990, 1041, 1065, 1120, 1120-S Returns and e-Filing QBI 16617: 1065/1120S – Wks QBI Calculation and Override 16072: QBI Deduction - Specified Service Trade or Business (SSTB) 16054: QBI Deduction - W2 Wage Allocation 1120S Common Issues and Topics 11747: 1120S - Calculating Schedule M-2 15031: 1065 – Appointed Representative (Tax Matters Partner) 10091: 1065/1120S – Section 179 Expense Not Flowing to Return 10920: 1065 – Partners Adjusted Basis Worksheet (Basis Wks) 10919: 1120S – Shareholders Adjusted Basis Worksheet (Basis Wks) 13350: 1041/1065/1120S – Change the Rounding Partner, Shareholder, or Beneficiary 13802: 1065 – Partner Special Allocations 11489: 1065 – Entering Guaranteed Payments for Partners 12095: Exporting Forms K1 from 1065, 1120S, or 1041 11677: 1041/1065/1120S - K-1 Codes Pass-Through Entity Tax Category