Categories: All Bookkeeping Payroll Individual Tax Business Tax Add-ons All / Business Tax Business Prior Year Tax Returns $300.00 Business Tax Services - Single-Member LLC / Sole Proprietor $500.00 Business Tax Services - Partnership or Multi-Member LLC (Form 1065) $500.00 Business Tax Services - S-Corporation (Form 1120S) $500.00 Business Tax Services - C-Corporation (Form 1120) $500.00