(AJC) — An unintentional paperwork error by Fulton County will cost Atlanta Public Schools $48 million and force the city to delay several school construction projects, in some cases indefinitely. Fulton officials didn’t file a form that accurately reflected the enrollments of the city and county school systems, resulting in an overpayment to Atlanta from a 1-percent sales tax used for school capital needs. Starting in August, Atlanta schools will make monthly payments until the amount is repaid, said Chuck Burbridge, the city school system’s chief financial officer. The mistake also increases the pressure on the school system as it explores whether to ask voters for a sales tax extension for another five years. Atlanta Mayor Kasim Reed has said the system should drop or greatly reduce its use of the sales tax when it expires next year.