Record incoming and outgoing invoices, received and provided services (products and services). Calculate federal, state, and municipal taxes: PIS, COFINS, IRPJ, CSLL, ICMS, ISS, DIFAL. Perform calculations and verifications of withholding taxes at source: IRRF, CSRF, INSS, PIS/COFINS/CSLL. Prepare, verify, and submit accessory obligations, such as: SPED Fiscal (EFD ICMS/IPI) EFD Contributions REINF DCTF/DCTFWEB ICMS, ISS, PIS, and COFINS legislation. Tax regimes: Simples Nacional, Presumed Profit, and Real Profit.