Checking the status of your refund online is easy. You'll need your social security number or ITIN, and the amount of the refund you're claiming. Go to revenue.wi.gov then click the Where's my Refund button. On this page, select the tax year you want information for. For example, if you want the status of your current refund, it will be the previous year's taxes. Next, enter your social security number or ITIN. Now, enter the amount of the refund that you claimed on your Wisconsin Income Tax return. Click search. If your refund is completed, or in process, a diagram will show the status. Depending on which stage your return is in, you will see an explanation below the diagram. If the explanation asks for documents we need to complete your return, send us the documents right away. Our systems are updated overnight, and our customer service representatives have the same information that you'll find on our website.