Diagnostic

Tax Compliance Diagnostic & Filing Plan

For messy, multiyear, or entity-related tax situations: find out exactly what needs to be filed before any return is prepared.

A tax compliance diagnostic is a review of your IRS and state records, prior filings, and entity setup that identifies what has to be filed and produces a written plan before tax return preparation begins.

Licensed CPA Former IRS Revenue AgentAll 50 states

Turnaround

Scoped per tax year

Pricing

$2,250–$7,500 per tax year · Final pricing based on scope · Return preparation is separate

Reviewed by

Andrew Pham, CPA · Former IRS Revenue Agent →

Last updated: June 2026

What's included

Every engagement covers

IRS and state transcript review

What the tax authorities have on record for you, year by year.

Historical filing review

Which returns were filed, and which were not.

Entity classification and ownership review

How each entity is classified for tax purposes and who owns it.

Tax election review

Elections that are in place, and whether they match how the business operates.

Multistate filing-obligation screening

Which states you may be required to file in.

Prior-year return assessment

A review of returns already filed before the next ones are prepared.

Identification of missing or required filings

A list of the returns and forms that still need to be filed.

Written filing and compliance plan

What needs to be filed, for which years, and in what order.

Preparation pricing for the next phase

A quote for the returns the diagnostic identifies.

Is this you?

You may benefit if…

  • You're unsure what needs to be filed
  • You have multiple unfiled years
  • You changed accountants
  • You inherited a complicated entity structure
  • You need prior filings reviewed before preparation begins

What you receive

Deliverables

Written filing and compliance plan
List of missing or required filings
Preparation pricing for the next phase

The process

How the engagement runs

  1. 01

    Consultation

    We talk through the situation and confirm a diagnostic is the right first step.

  2. 02

    Diagnostic

    We review transcripts, prior filings, entities, and elections for each tax year in scope.

  3. 03

    Filing plan

    You receive a written filing and compliance plan with pricing for the preparation work.

  4. 04

    Preparation

    Tax return preparation is a separate engagement that begins after the diagnostic.

Typical situations

You're in the right place if…

Several years haven't been filed

We review transcripts and filing history to identify which years and returns are required before anything is prepared.

You took over a business with an unclear structure

We review entity classification, ownership, and elections to identify which returns the entity should be filing.

You switched accountants and aren't sure what was filed

We review prior filings so preparation starts from an accurate picture.

FAQ

Frequently asked questions

Next step

Tell us what's on your plate.

Most engagements are scoped and priced within 48–72 hours. Free 30-minute Consultation Call — no obligation.

Replies within 24 hours · Mon–Fri 9–6 ET · or email andy@sidegrowthpartners.com