OB Tax Man Services in Chula Vista handles individual and small-business tax preparation alongside general consulting from a Kiley Road office in the 91910 zip code. The consulting scope covers entity-formation guidance and estimated-tax scheduling for independent contractors, and the firm prepares federal returns for ITIN-applicant filers whose immigration-documentation needs run through providers in the same corridor, including Dina's Immigration Services. Schedule C sole-proprietor returns, Form 1040 personal filings, and California Form 540 state returns form the core preparation workload. International-income filings require certified translations and apostilled foreign documents for source-income verification, a step coordinated through Document Apostille and Certified Translation | Interdocpro. Advanced engagements include California Form 540NR nonresident allocation schedules, FBAR threshold analysis for aggregate foreign-account balances exceeding $10,000, and IRS Form 2555 foreign-earned-income exclusion calculations.