Form 1120 Cash-Basis Filing When preparing Form 1120 for a cash-method C-Corp, use the expense sheet (bank-activity view) as authoritative source of truth for revenue and expenses. Map each expense line to corresponding Form 1120 line items, then coordinate Schedule J, L, K, M-1, M-2. FreeTaxUSA does not support Form 1120; use TaxAct Business Online, IRS PDF, or PdfFiller. TaxAct Business Online — Interview Flow TaxAct uses a guided interview format. The sidebar sections are: About the Business Officers Federal (Income, Deductions, Credits, Miscellaneous, Summary) State Review Filing Schedule…