US Tax Preparation — Done Right.

Whatever your structure — from sole proprietorship to multi-entity corporation — you get accurate, optimized returns across all 50 states. Every deduction caught, and peace of mind — not just a filing.

Returns we handle
Form 1120 (C-Corp) Form 1120-S (S-Corp) Form 1065 (Partnership) Form 1040 (Individual) State Returns (All 50) Estimated Quarterlies Sales Tax / E-commerce

Complete tax preparation, end to end

Federal Business Tax Returns

We prepare Form 1120 (C-Corp), 1120-S (S-Corp), 1065 (Partnership), and Schedule C (Sole Proprietor). Every return is reviewed by a senior accountant before submission.

State & Multi-State Returns

Operating in multiple states? We handle nexus analysis, state tax registrations, and returns across all 50 states plus DC. We track filing deadlines so you never miss one.

Quarterly Estimated Taxes

We calculate and prepare your quarterly estimated payments (Form 1040-ES or 1120-W) so you never face underpayment penalties. We remind you before each deadline.

Sales Tax & E-commerce Compliance

Post-Wayfair, economic nexus rules can create surprise sales tax obligations. We track your thresholds, handle registrations, and file returns in all required states.

Deduction Maximization

Our team proactively identifies every legitimate deduction — Section 179 expensing, bonus depreciation, home office, vehicle, retirement plan contributions, and more.

IRS E-filing & Confirmation

All returns are prepared for electronic filing and signed off by your designated preparer. E-file confirmation typically follows within 48 hours of submission; we track acceptance and notify you immediately.

Included In All Plans

Federal business tax return
State returns (base state)
Quarterly estimates
Prepared for IRS e-filing & confirmation
Deadline tracking
Year-end tax checklist

Key Deadlines We Track

Mar 15 — S-Corp / Partnership
Apr 15 — C-Corp / Individual
Q1-Q4 Estimated payments
State-specific deadlines

Ready to get started?

Tax preparation is included in all Advisory Monks Consulting plans starting at $2,500/month.

Book a 20-minute fit call → View Pricing →

How we prepare your tax return

01

Document Collection

We send you a tailored document checklist by email. Share your documents securely — bank statements, 1099s, prior returns, receipts. We follow up proactively on anything missing.

02

Accountant Review & Preparation

Your dedicated accountant reviews everything, identifies deductions, and prepares the draft return. Complex situations are escalated to senior reviewers with specialty expertise.

03

Quality Control Check

Every return goes through a second-reviewer QC process before it reaches you. We check for accuracy, missed deductions, and state-specific requirements.

04

Client Review & Approval

You receive the draft return with a clear summary of key numbers, estimated tax due/refund, and any notes. We walk you through it on a call if you'd like.

05

E-filing & Confirmation

Once approved, your return is finalized for filing by your designated licensed preparer. You receive IRS acceptance confirmation within 48 hours, along with a copy of the filed return for your records.