What is sales tax return preparation?
Per-state returns prepared from a reconciled ledger on each state’s own calendar — monthly, quarterly or annual.
There is no federal sales tax and no single national return. Once a business has nexus in a state — a warehouse, an employee, or simply crossing that state's economic threshold on remote sales — that state assigns a filing frequency (monthly, quarterly or annual, based on expected volume, not chosen by the business) and expects a return on its own calendar, filed through its own Department of Revenue portal, against its own rate table. A business selling into fifteen states is running fifteen separate filing calendars with fifteen different due dates, most falling on the 20th of the month following the period but not all of them, and there is no consolidated multi-state return anywhere in the system.
The return itself is a jurisdiction-level exercise, not a single state-rate calculation. Many states require sales broken out by city, county and special taxing district even within one state return, because local add-on rates stack on top of the state rate and each layer has to be reported separately. A single Shopify or Stripe export of "total sales by state" is not filing-ready data — it has to be reconciled down to taxable vs. exempt (resale certificates on file, exempt product categories, and any marketplace-facilitator-collected sales that must be excluded so the same tax isn't remitted twice) before a number goes on any state's form.
Who does what
CapEasy prepares; returns are submitted under your account credentials or through the partner firm where a state’s rules require it.
Who does what
| Your CapEasy team | Sales tax return preparation, the reconciliations and reporting behind it, and the questions list that keeps it honest. |
| Your CPA or enrolled agent | Everything that carries a licence in United States — rendered exactly as written: issue compilation, review or audit reports — those are restricted to licensed cpa firms. |
| You | One conversation with one named person, and the decisions that are genuinely yours. |
Sales tax return preparation in United States
Filing frequency is assigned by the state, not chosen by the business
When a state issues a sales tax permit, it also assigns a filing frequency — monthly, quarterly or annual — based on the expected volume of tax the business will collect, and that assignment can change later if actual volume moves. A business does not get to pick quarterly because it's simpler to administer; the calendar we build tracks whatever frequency each state has actually assigned, state by state, because a returns pattern built on an assumed frequency drifts out of sync with the real due dates within a year.
Due dates cluster around the 20th but aren't uniform — and each is that state's, not a shared national date
Most states set the sales tax return due date at the 20th of the month following the period, but some run to the last day of the month instead, and a handful vary by filer size or frequency. There is no single national due date the way there is with a federal form — every state's calendar is tracked on its own terms, and a calendar with one shared 'the 20th' assumption baked in is the fastest way to miss a state that runs differently.
Zero returns are still due — silence reads as a missed filing, not a quiet period
In most states, a period with no taxable sales still requires a filed "zero" return; simply not filing because there was nothing to report is treated the same as a missed filing and can trigger a non-filer notice. We file the zero return on the same calendar as every other period for that state so a slow quarter never quietly turns into a compliance problem.
A jurisdiction-level breakdown is often required even on a single state return
City, county and special-district tax rates layer on top of the state rate in many states, and the return itself asks for sales broken out by jurisdiction, not just a single state-wide total. Getting this wrong doesn't just misstate the total tax due — it misallocates money between jurisdictions that each expect their own cut, which is exactly what a jurisdiction-level audit checks first.
What your CPA or enrolled agent receives from us
- A per-state, per-period sales-by-jurisdiction reconciliation — taxable sales broken out by city, county and special district where that state's return requires it.
- The taxable-vs-exempt split for the period, with resale certificates and exempt product categories matched against the sales they cover.
- Marketplace-facilitator-collected sales excluded from the direct-channel taxable base, itemised so the exclusion is checkable against the marketplace's own remittance report.
- The tax-due calculation per jurisdiction, run against that state's current rate table for the period being filed.
- A return package built to each state's own form and formatted for entry on that state's e-file portal — ready to submit under the client's login and POA.
- A filing calendar covering every registered state's assigned frequency, due date, and zero-return requirement, so no state's period goes unfiled for lack of tracking.
