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revenue use requirements of 49 U.S.C. 47107(b) and 49 U.S.C. 47133. Any prepayment made pursuant to Section 2d of this Act shall be included in the amount on which such discount is computed. In the case of retailers who report and pay the tax on a transaction by transaction basis, as provided in this Section, such discount shall be taken with each such tax remittance instead of when such retailer files his periodic return, but, beginning with returns due on or after January 1, 2025, the vendor's discount allowed under this Section and the Use Tax Act, including any local tax administered by the Department and reported on the same transaction return, shall not exceed $1,000 per month for all transaction returns filed during the month. The discount allowed under this Section is allowed only for returns that are filed in the manner required by this Act. The Department may disallow the discount for retailers whose certificate of registration is revoked at the time the return is filed, but only if the Department's decision to revoke the certificate of registration has become final. Before October 1, 2000, if the taxpayer's average monthly tax liability to the Department under this Act, the Use Tax Act, the Service Occupation Tax Act, and the Service Use Tax Act, excluding any liability for prepaid sales tax to be remitted in accordance with Section 2d of this Act, was $10,000 or more during the preceding 4 complete calendar quarters, he shall file a return with the Department each SB3019 Enrolled LRB104 20255 HLH 33706 b Public Act 104-0468