ORLANDO, Fla. - Millions of Americans will not have to wait anymore: a vast majority of stimulus checks are hitting bank accounts on Wednesday."The IRS recently sent an initial wave of tens of millions of economic impact payments via the Automated Clearing House (ACH) system," according to a statement issued by nine banking and credit union industry groups. "The actual funds will be sent to the banks and credit unions on March 17, at which time funds will be made available to customers."People should check their bank accounts in the morning because the IRS is expected to deposit the majority of the third round of stimulus money.