Mats Corporation in Chula Vista's Broadway corridor operates as Monica's Accounting & Tax Services (MATS LLC), delivering tax preparation, payroll processing, and financial consulting from 664 Broadway. The firm's payroll division generates quarterly Form 941 federal tax deposits and California DE 9C wage-detail reports, coordinating employer withholding remittances with banking partners such as Enterprise Bank & Trust on the same commercial strip. Service lines extend to bookkeeping, accounts-receivable reconciliation, and nonprofit compliance filings on IRS Form 990. Corporation and LLC formation clients receive entity-structure guidance that accounts for California franchise-tax obligations—work that often runs in parallel with the estate and trust planning handled by MJ Trust Law across the city. Year-end engagements include multi-state apportionment calculations for California Schedule R filers with revenue sourced outside the state.