Eversource submits supplemental compliance filing containing revisions to the calculation of the annual transmission revenue requirements for local transmission service under Schedule 21-ES to deduct excess accumulated deferred income taxes (ADIT) from, or add any deficient ADIT to, rate base (Rate Base Adjustment Mechanism) and to increase or decrease the income tax allowances by any amortized excess or deficient ADIT (Income Tax Allowance Mechanism).  Revisions to Schedule ES-1 also proposed to ensure the return of excess ADIT to customers and proper alignment of rates
under Schedule 21-ES.