Square does not automatically send sales tax to the state. It calculates and collects sales tax from your customers at checkout, but the responsibility to file returns and remit payment stays with you.

This is a common point of confusion. Square handles the collection side well. It figures out the right tax rate based on your location, adds it to customer receipts, and tracks how much you’ve collected. What it doesn’t do is file your sales tax return or transfer that money to Missouri or any other state.

You can find your collected sales tax in Square’s reporting dashboard. Go to Reports, then Sales, and look at the tax breakdown. This shows how much sales tax you collected over whatever period you need. That number is what you report on your Missouri sales tax return.

Missouri requires businesses to file sales tax returns monthly, quarterly, or annually depending on how much you collect. Most small businesses file quarterly. The return is due on the last day of the month following each period. Miss a filing and you’re looking at penalties and interest that add up quickly. A Mid-Missouri bookkeeper can help you stay on top of these deadlines.

The actual filing happens through Missouri’s online tax portal. You report your total sales, taxable sales, and the sales tax collected. Then you pay what you owe. If your Square reports are accurate and you’ve categorized transactions correctly, this process is straightforward. If your records are disorganized, filing becomes a guessing game.

Some businesses use third-party services like TaxJar or Avalara to automate filings. These tools pull data from Square and submit returns on your behalf. They cost money but can be worth it if you’re selling in multiple states or have high transaction volumes.

For most small businesses, outsourcing sales tax filing makes more sense than adding another software subscription. The filing itself isn’t complicated once your books are clean. The hard part is staying on top of deadlines and making sure the numbers reconcile with what Square collected.

If you’ve been assuming Square was handling sales tax for you, check your Missouri tax account. You might have unfiled returns that need attention before penalties stack up.