Note: You must complete a separate Form 3911 for each refund for which you are requesting information. Use Form 843 to claim a refund or request an abatement of certain taxes, interest, penalties, fees, and additions to tax.The IRS provides information, tools, options and resources for filing taxes as well as tips to help us detect and protect against identity theft. Check the box below that indicates your reason for filing Form 843. Tax. Abatement or refund of tax other than income, estate, or gift tax. Overpayment refunds of vehicle and business tangible property taxes will be sent within 2 to 4 weeks from the date of the payment or exoneration. If you don't owe taxes, but also aren't getting a refund, use the "Refund Returns" address. Use Form 4506-T to request tax return information. Taxpayers using a tax year beginning in one calendar year and ending in the following year (fiscal tax year). Use Form 843 to claim a refund or request an abatement of certain taxes, penalties, additions to tax, interest, and fees.