Josh - In practice it was rare, very rare, for US citizens to elect to claim the remittance basis. Based on the limited information provided, electing to have claimed the remittance basis may not have saved much - if any - tax globally. You could nonetheless probably elect to claim the FIG regime for 2024-25, but this still may not produce the optimum outcome. You'll already hopefully be using bookkeeping software so that you'll be MTD compliant once this is required of you. You may wish to engage a dually US & UK qualified tax accountant to provide a full overview of your situation.