OUR STAFF REPORTER ISLAMABAD Federal Board of Revenue has extended the date for payment of taxes/duty for the tax period May, 2011, and filing of Sales Tax / Federal Excise returns, up to 20th June, 2011, for registered persons claiming benefit, in exercise of the powers conferred under section 74 of the Sales Tax Act, 1990 and section 43 of the Federal Excise Act, 2005, under SRO. 283(I)/2011 dated 01.04.2011.