Sales Tax Filing• California CDTFA & Multi-State
State Sales Tax Calculation & 100% Timely E-Filing
Accurate calculation and electronic filing of California CDTFA and multi-state sales & use taxes. We eliminate 10% late filing penalties and resolve Economic Nexus thresholds.
Amazon & E-Commerce Sellers
Online sellers with nationwide US customers requiring state-by-state sales tax reporting.
E-CommerceRetail & Restaurant Business Owners
Brick-and-mortar stores and restaurants filing regular CDTFA sales tax returns.
Retail StoreMulti-State Expansion Corporations
Businesses exceeding $100,000 out-of-state sales triggering Economic Nexus compliance.
Multi-State NexusExceeding $100k sales or 200 transactions out-of-state triggers Economic Nexus filing requirements even without physical locations.
Official state electronic filing receipts and confirmed tax remittance payment confirmations delivered immediately.
Key Features & Core Benefits
Strict IRS compliance and maximum refund accuracy.
State-by-State Economic Nexus Audit
Evaluating out-of-state sales thresholds to determine Economic Nexus filing obligations.
California CDTFA & District Tax Calculation
Calculating local district tax additions accurately matching California CDTFA rate schedules.
Official State E-Filing & Tax Remittance
E-filing sales tax returns and remitting collected tax funds directly to state portals.
Resale Exemption & Certificate Verification
Categorizing wholesale tax-exempt sales supported by valid resale certificates.
Penalty & Interest Avoidance Shield
Managing strict monthly/quarterly filing calendars to avoid 10% late filing penalties.
Sales Tax Audit Defense Record Preservation
Archiving sales registers and merchant processing records for 4 years to defend state audits.
Simple 4-Step Process
Track your filing progress transparently online.
Sales Data Collection
Gathering sales reports from Amazon, Shopify, and POS systems for the period.
District & Taxable Sales Audit
Categorizing taxable gross sales, exempt wholesale, and local district tax rates.
CPA Return Review & Approval
Bilingual CPA cross-checks tax returns and confirms final tax remittance totals.
CDTFA & State E-Filing Complete
Executing official e-filing with CDTFA and state revenue departments with receipts.
Frequently Asked Questions
Find clear answers to common questions about filing US taxes with TPT Tax.
Real Reviews from Satisfied Clients
Read authentic, verified 5-star reviews from clients who trusted TPT Tax with their US filings.
Michael R.
07/19/2026
Top Priority Tax made my US tax filing seamless and completely stress-free. Exceptional bilingual CPA team!
Jessica S.
07/14/2026
Extremely prompt, professional, and knowledgeable. They saved me thousands on my business tax return with great advice.
Daniel K.
07/08/2026
The 24/7 online portal is so convenient. My W-2, crypto, and stock gain tax reports were processed flawlessly.
Robert L.
07/02/2026
Best accounting and tax advisory service I have used in California. Highly recommended for all expats and freelancers!
File State Sales & Use Taxes On Time
Accurate CDTFA and multi-state sales tax calculation and e-filing preventing late penalties.