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Rubric Financial

Tax Services

Tax done right, once a year and every quarter in between.

Updated August 2026

Rubric Financial prepares and files federal, state, multi-state, sales, and cross-border tax returns for small businesses, professional-services partnerships, and high-net-worth individuals. Every return is drafted by a preparer, reviewed and signed by a licensed CPA, and delivered with a working review meeting so nothing goes to the IRS you haven't seen. Headquartered in San Francisco; serving businesses across the United States.

Fixed monthly or fixed-fee pricing · your partner replies within one business day · no per-question billing · year-round access, not just April.

Scope

Which tax returns do we file?

We file every federal and state return a small business or high-net-worth individual typically needs. That covers pass-through entities, corporations, sole proprietors, individuals, trusts, nonprofits, and cross-border information returns.

Below is the working list of return types we handle, when they are due, and who signs. Every filing is reviewed and signed by Aparna Devalla, CPA before it leaves the office.

Entity or filerReturnFiling deadlineSigned by
S-corporationForm 1120-S + K-1sMarch 15 (extension to Sept 15)CPA-signed
Partnership / multi-member LLCForm 1065 + K-1sMarch 15 (extension to Sept 15)CPA-signed
C-corporationForm 1120April 15 (extension to Oct 15)CPA-signed
Single-member LLC / sole propSchedule C on Form 1040April 15 (extension to Oct 15)CPA-signed
Individual (owner or W-2)Form 1040 + state returnsApril 15 (extension to Oct 15)CPA-signed
NonprofitForm 990 / 990-EZ / 990-NMay 15 (calendar year)CPA-signed
Estate & trustForm 1041 + K-1sApril 15 (extension to Sept 30)CPA-signed
Foreign-owned entityForm 5472 / 5471 / 8865With the entity's income-tax returnCPA-signed
Individual with foreign accountsFinCEN 114 (FBAR) + Form 8938April 15 (auto-extension for FBAR to Oct 15)CPA-signed

Deadlines shown assume calendar-year filers. Fiscal-year filers get an entity-specific schedule at engagement. Quarterly federal estimated-tax deadlines (April 15, June 15, September 15, and January 15 of the following year) are tracked separately in your engagement calendar. For every 2026 date by entity type, including payroll and 1099 filings, see the 2026 tax deadlines calendar.

How the tax practice is organized

Six sub-services under one roof

Most tax problems are actually two or three tax problems bolted together. We group our CPA tax services into six sub-services so scoping is transparent, engage one, or engage the set.

Business Tax & CPA Services

Federal, state, and local business returns, CPA-reviewed and signed.

Entity returns for S-corps, partnerships, LLCs, and C-corps, plus quarterly estimates, sales tax, multi-state nexus, and year-round planning. We handle IRS and state notices as part of the engagement.

Personal Tax

A personal tax CPA for business owners, professional-services partners, and high-net-worth individuals.

Equity comp (ISO, NSO, RSU, ESPP, AMT), K-1s from passthroughs, multi-state and part-year filings, quarterly estimates, and coordinated business plus personal planning. Fee-only, no commissions, no kickbacks.

Tax Planning

Proactive multi-year planning for individuals and businesses. The moves that lower your bill are made before December 31, not at the filing table.

Q3 and Q4 shift to planning: multi-year projections, entity elections, capital-gain and loss harvesting, S-corp reasonable-comp modeling, depreciation and credit timing, equity-comp and AMT planning, and charitable-giving strategy. Two to three planning meetings per year.

Multi-State Tax

Multi-state entity and individual filings with nexus review.

State registrations, apportionment, coordinated resident and non-resident 1040s, and annual nexus review as remote hires, customers, or property push you into new states.

Sales / Nexus Tax

Post-Wayfair economic-nexus tracking, registration, and filings.

For e-commerce, SaaS, and multi-state service businesses. We monitor thresholds, register in each state as they trip, and file monthly, quarterly, or annually as required.

Cross-Border Tax (US–India)

U.S. compliance for clients with India-side income or investments.

FBAR (FinCEN 114), Form 8938, PFIC (Form 8621), Form 5471/8865, GILTI, treaty positions, RNOR transition, §877A exit tax, and coordinated U.S.–India filings.

Process

How does Rubric Financial handle your tax filings?

Every engagement follows the same five-step process: scope the work, collect documents, draft under CPA review, walk through the return with you, then file and calendar the next set of deadlines.

The point of the process is predictability, you always know what's due, who is working on it, and what happens next.

  1. 1

    Intro call and scoping

    We start with a 30-minute intro call to understand your entity structure, states of activity, prior-year complications, and what you actually need done. You get a fixed-fee proposal the next business day, no per-question billing, no surprise add-ons.

  2. 2

    Document collection through a secure portal

    You upload prior-year returns, current-year books, K-1s, brokerage 1099s, closing statements, and any letters from the IRS or state. We send a specific checklist for your entity type instead of a generic organizer.

  3. 3

    Draft prepared by a preparer, then reviewed by a CPA

    A preparer builds the return in professional tax software (not the DIY tools), reconciles it to your books, and applies planning positions we discussed at scoping. A licensed CPA, Aparna Devalla, then reviews and signs every filing.

  4. 4

    Review meeting before we file

    We schedule a working session to walk through the return, show you where the numbers came from, explain any planning opportunities for next year, and confirm the estimated-tax plan. Nothing goes to the IRS without your sign-off.

  5. 5

    E-file, confirmations, and year-round follow-up

    We e-file the return, send you copies of every acceptance confirmation, and calendar the next set of deadlines (quarterly estimates, extensions, sales-tax filings). If a notice lands, we handle the response, it's included, not an extra fee.

No-obligation tax-planning session

A free planning conversation with our CPAs.

Sit with our CPAs for 30 minutes, no obligation. We'll walk through your entity, your states, your prior-year return, and your upcoming decisions, and identify the tax-planning levers worth pulling before December 31. If it's a fit to work together, we'll scope a fixed fee. If not, you leave with a concrete list of moves to make on your own or take to your current CPA. Either way, no cost, no sales pitch.

Q1 and Q2 we're heads-down on filings. Q3 and Q4 we shift gears to planning. This session runs year-round.

What tax planning covers

Free tools

Run the numbers yourself first

Every calculator is free, requires no sign-up, and uses the same methodology we apply on actual client returns. Start with the S-corp savings check if you're deciding on an election; start with quarterly estimates if you're trying to stay current.

See the full library on the calculators page.

Glossary

Common tax terms

Plain-English definitions of the terms that come up most often in tax filings, planning, and IRS correspondence.

Schedule K-1

IRS form reporting a partner's, S-corp shareholder's, or trust beneficiary's share of income, deductions, and credits.

Passthrough Entity

A business entity that doesn't pay federal income tax; income passes through to the owners.

S-Corporation (S-corp)

A passthrough entity that allows owner-employees to split income between salary (subject to FICA) and distribution (not).

Limited Liability Company (LLC)

A flexible legal entity that combines personal liability protection with passthrough taxation by default.

Qualified Business Income (QBI) Deduction

A 20% deduction on qualified business income from passthrough entities, available to most small business owners.

Alternative Minimum Tax (AMT)

A parallel federal tax system that can require additional tax beyond the regular calculation, especially for ISO exercises.

Incentive Stock Option (ISO)

An employee stock option with favorable tax treatment if specific holding requirements are met.

Non-Qualified Stock Option (NSO)

A stock option whose spread at exercise is taxed as ordinary W-2 income.

Restricted Stock Unit (RSU)

A grant of company shares that vests over time and is taxed as ordinary income at vest.

Employee Stock Purchase Plan (ESPP)

A program letting employees buy company stock at a discount, often with a lookback feature.

Self-Employment Tax

Combined Social Security + Medicare tax (15.3%) owed by self-employed individuals on net earnings.

Nexus

The connection between a business and a state that creates a tax filing or registration obligation.

What you can count on

Three commitments, written down.

CPA-signed accuracy guarantee

If a return signed by Rubric Financial triggers a math-error notice, we fix it and pay the resulting IRS penalty, subject to your engagement letter's terms. CPA review on every filing.

One-business-day response

Your partner replies within one business day, and there's no per-question fee. Year-round access, not just tax season.

Fee-only, no kickbacks

We don't sell insurance, annuities, or investment products. Our only revenue is your monthly fee. No conflicts.

Frequently Asked

Tax questions we hear often

Which tax returns do you file?
We file federal and state returns for S-corporations (1120-S), partnerships and multi-member LLCs (1065), C-corporations (1120), single-member LLCs and sole proprietors (Schedule C on 1040), individuals (1040), estates and trusts (1041), and nonprofits (990). We also handle information returns for foreign-owned entities (5471/5472/8865) and foreign-account reporting for individuals (FBAR/8938).
How much does a small business tax return cost?
Our small business tax services are fixed-fee, quoted after a scoping call. Business returns scale with entity count, state count, K-1 volume, and cleanup work; personal returns scale with equity comp, K-1s, and multi-state complexity. We quote in writing before starting, and the number does not move unless the scope does.
Do I need a CPA or is a tax preparer enough?
A licensed CPA carries state-board oversight, continuing-education requirements, and personal accountability for the position taken on your return. That matters most when the return involves an entity election (S-corp, partnership), K-1s, multi-state activity, equity compensation, cross-border reporting, or a prior-year notice. For a simple W-2 return, a preparer is often enough. Every return we file, business or personal, is signed by Aparna Devalla, CPA.
Can you catch up on prior-year returns that were never filed?
Yes. We handle back-year returns for individuals and entities, coordinate voluntary disclosures where the exposure warrants it, respond to any IRS or state notices already issued, and put you back on a normal filing calendar. Cleanup is scoped separately from ongoing tax work so the fee is transparent.
Do you handle multi-state filings and nexus questions?
Yes. Remote employees, out-of-state customers, drop-shipping arrangements, and rental property all create state-tax obligations. We review your operating footprint annually, register your entity in additional states as needed, apportion income across states, and file every required return. We also handle economic-nexus sales-tax registration and monthly filings for e-commerce and SaaS sellers.
Do you handle equity compensation on personal returns?
Yes. ISO exercises and AMT, disqualifying dispositions of ISOs and ESPP, NSO exercises and ordinary-income reporting, RSU vesting and cost-basis correction, 83(b) elections, and coordinated withholding review are all handled on the personal side. We plan the sale year at intake instead of catching it at filing.
Do you handle US–India cross-border tax?
Yes, it's a specialty. We file FBAR (FinCEN 114) and Form 8938 on Indian accounts, run PFIC analysis and Form 8621 on Indian mutual funds, prepare Form 5471/8865 for U.S. owners of Indian entities, take treaty positions where they apply, and coordinate with your Indian-side CA so the India ITR and U.S. 1040 line up. Returning NRI / RNOR transition planning and §877A exit-tax review are also handled.
What if I already have a CPA, do I have to switch?
Not unless you want to. Many clients start with just personal tax, or just the business return, and expand from there. If you have a working relationship you like, we can also just handle the piece your current CPA doesn't (multi-state, valuation, cross-border, FP&A) and stay coordinated.
Is this the right firm for a VC-backed startup?
No. Rubric Financial is purpose-built for small businesses and high-net-worth individuals. If you are venture-backed and need R&D credit studies, 409A coordination, cap-table workflows, and board-pack reporting, use our sister practice, StartupCFO.AI, same firm, same partners, tooling and workflows optimized for venture-scale startups. QSBS planning for founders and early employees is handled here at Rubric Financial.

Ready to get tax off your plate?

Tell us about your entity, your states, and your prior-year complications. We'll scope the work, quote a fixed fee the next business day, and file with a CPA on the signature line, same partner, every conversation.

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