inhibitor - a substance that retards or stops an activity. substance - a particular kind or species of matter with uniform properties; shigella is one of the most toxic substances known to man. angiotensin II inhibitor - an agent that retards or restrains the action of angiotensin II. antioxidant - substance that inhibits oxidation or inhibits reactions promoted by oxygen or peroxides. anticatalyst - (chemistry) a substance that retards a chemical reaction or diminishes the activity of a catalyst.
Amended returns typically take 8-12 weeks for the IRS to process, so you should wait at least 8 weeks before checking on the status of your tax refund. If it has been over 12 weeks since you filed your amendment and you have not received your refund, you should call the IRS at 1-800-829-1040 and speak to a customer service representative.
This is because the IRS treats all tax returns you file on or before the deadline as filed on April 15th. However, when you file a tax return after the April deadline, you start counting the three years on the actual filing date. But suppose your 2008 tax return reports an amount you owe to the IRS rather than a refund. If you file your return on time but don't pay the tax until May 15, 2010, you now have until May 15, 2012 to file an amended return under the 2-year rule. Unfortunately, if you don't file your 1040X on time, the IRS has no obligation to send you an additional refund.