Comelco Group, Inc. in Chula Vista provides accounting and tax services from 2638 Main Street, Suite G, operating under the dba Walter Lacayo Business Services after a 2014 acquisition that brought binational business-advisory capabilities to the 91911 corridor. Bilingual document sets including Spanish-language invoices, letterheads, and client-facing tax organizers are produced through coordination with local vendors such as CV Graphics and Printing for offset and digital runs. The firm pairs Walter Lacayo's 20-plus years of San Diego-area accounting experience with cross-border infrastructure consulting for clients operating simultaneously in California and Baja California. Large-format financial reports, presentation decks for lender meetings, and bound audit workpapers are printed through shops such as MK Printshop, Inc. when client deliverables require physical document packages. Services span personal and business tax preparation, monthly bookkeeping with full-cycle general-ledger maintenance, payroll processing including quarterly Form 941 filings, and business-entity structuring for binational LLCs and Mexican sociedades.