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.
If you owe taxes for a previous tax year, the IRS may charge you late filing and late payment penalties plus interest on taxes owed. After April 17, 2018, you can still prepare and efile a 2017 tax return on efile.com until October 15, 2018 (after that date, the IRS will no longer accept 2017 returns electronically, and you will need to paper file your 2017 return).