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.I request that you send a replacement refund, and if I receive two refunds, I will return one. If you file online, you can expect to receive your refund within 2 weeks. If filing on paper, you should receive your refund within 6 weeks. You can find the CP or LTR number on the right corner of the letter. Page provides taxpayers and tax professionals the mailing address for submitting Form 843. Welcome to MassTaxConnect, the Massachusetts Department of Revenue's web-based application for filing and paying taxes in the Commonwealth. Private letter ruling requests require the payment of. ➢ I never filed a tax return.