Preparing both individual and small-business tax returns in North Park’s 92104 ZIP code, CASM Tax Service Inc. operates from 3835 Swift Ave #317. Businesses requiring ongoing bookkeeping beyond tax season can continue working with firms like Sirius Accounting Solutions for year-round ledger maintenance. CASM handles personal income-tax preparation, business entity returns, and quarterly estimated-tax filings for sole proprietors, partnerships, and S-corporations. Clients facing IRS notices or state audit correspondence sometimes escalate to legal counsel at Law Offices of Kroger-Diamond & Campos APC for representation. The firm’s most involved engagements cover multi-entity return preparation for business owners operating several LLCs or corporations with intercompany transactions requiring consolidated Schedule K-1 reporting.