To claim a refund, you must file an amended return within 3 years after the date you filed your original return or 2 years after the date you paid the tax. File an amended return if there's a change in your filing status, income, deductions, credits, or tax liability.The additional time, provided in Notice 202321, to file an amended return is automatic. Sample Soft Letters can be viewed here, here, here, and here. This is going to be the form that you're going to need to use if you're amending the tax return from 2019 2020 or 2021. You will either need to have an officer of the company call the IRS to authorize them to share the information with you on the phone or complete the form 2848. Look on the Sales and Use tax menu under Account Self-Service and select "Request a Duplicate Sales Tax Permit". Get your refund status.