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2011 Instructions For Estimating PA Personal Income Tax
Estimated tax is the method used to pay tax on income that is not subject to withholding such as: Wages for domestic service;.
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Part 1 Section 6621.--Determination of Rate of Interest
Rev. Rul. 2011-18. Section 6621 of the Internal Revenue Code establishes the rates for interest on tax overpayments and tax underpayments.
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Find quarterly interest rates on tax underpayments and overpayments for individuals and businesses and information on how interest is calculated.
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