Avalara Returns for Small Business helps reduce sales tax return preparation time and eliminates the hassle of filing with each state website. Connect with your Shopify sales data and we'll create sales tax returns for every state where you are required to collect sales tax. Use our interactive tool to find state-specific information and stay on top of deadlines with monthly reminders. If you are a Shopify Plus customer and wish to calculate sales tax with AvaTax, please contact Shopify Support.