Sales Tax Filings
Portside can prepare and file your sales tax returns in every state you need, accurately and on time, so you never worry about missed deadlines.
Best for: Businesses filing sales tax in one or more states · Nonprofits filing sales tax in one or more states · Organizations that need to register to remit sales tax · Organizations that need to evaluate sales tax nexus in multiple states
What's included
Portside ensures every return is prepared correctly to prevent errors and penalties.
Portside manages filings across all states and localities where your business operates.
Whether your business or organization files monthly, quarterly, semiannually, or somewhere in between - Portside tracks deadlines so your filings are always submitted on time.
Portside always verifies that the tax you’ve collected matches what’s remitted to authorities.
Portside helps you understand where you have sales tax obligations and ensure proper registration.
Portside manages any official communications to resolve issues quickly.
You can safely share and submit documents online without hassle.
Portside stays on top of changing rules so you don’t have to.
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Portside provides tailored guidance to protect your business and reduce risk.
How it works
A short online intake form with just a few questions.
Portside will research filing obligations and nexus requirements for your organization.
Your advisor will coordinate filing and reconciliation for sales tax returns in all applicable states.
You get your finished work, with support every step of the way.
Common questions about this service
Do I need to collect and file sales tax for my business?
Sales tax is imposed by states (and often local governments), not the IRS. Whether you must collect it depends on what you sell and whether you have nexus, meaning a sufficient connection to a state, through a physical presence or economic activity such as sales volume. We review where you sell and tell you where you need to register.
What happens if I miss a sales tax filing?
States generally charge penalties and interest on late or unfiled returns, and sales tax collected from customers is treated as money held in trust for the state. If you have fallen behind, we can help you file past-due returns and explore penalty relief or voluntary disclosure options where available.
How often do I have to file sales tax returns?
Each state assigns a filing frequency, usually monthly, quarterly or annually, based on your expected or actual taxable sales. The state tells you your frequency when you register, and it can change as your sales grow. We track your due dates and file on schedule.
Do I owe sales tax if I sell online to customers in other states?
Possibly. Since the U.S. Supreme Court's 2018 Wayfair decision, states can require out-of-state sellers to collect sales tax once they pass an economic nexus threshold, which varies by state. Marketplace facilitators may collect for you on some sales. We map your sales by state and handle registration and filing.
Ready to learn more & get started?
Share a few details and Portside will take it from there.
Tell Portside about your sales tax needs