IFTA is the International Fuel Tax Agreement used to obtain an IFTA sticker.  Through the IFTA, member jurisdictions act cooperatively to administer and collect motor fuel use taxes.
 
The purpose of IFTA is to establish and maintain the concept of one fuel use license for interstate carriers and one administering base jurisdiction for each license holder. An IFTA license allows a taxpayer to file one tax report that covers all member jurisdictions.
 
Filing deadlines for each quarter –
April 30th for Quarter 1
July 31st for Quarter 2
October 31st for Quarter 3
January 31st for Quarter 4
Late filing will result in late penalties and/or interest rates.
 
Penalties – A penalty of $50 or 10% of delinquent taxes, whichever is greater, will be charged for failing to file a tax return, filing a late tax return, and underpaying taxes due.
 
Interest Rates – The current IFTA annual interest rate is 6% (increasing to 7% in 2019). Your base jurisdiction, for itself and on behalf of other jurisdictions (states/provinces) will charge interest on all delinquent taxes due to each jurisdiction, except IFTA taxes already collected by other jurisdictions according to IFTA procedures.