The Brazilian Supreme Federal Court (STF) is set to rule in September on one of the most critical tax cases facing corporate Brazil this year, which will decide whether state-granted tax incentives are subject to federal taxes. The case, known as General Repercussion Topic 843, will resolve if presumed credits for the State Value-Added Tax (ICMS) must be included in the calculation base for two key federal levies, the Contribution to the Social Integration Program (PIS) and the Contribution for Social Security Financing (COFINS). The outcome is binding for all courts nationwide and could result in an estimated federal revenue loss of R$16.5 billion (approximately $3.2 billion) over five years if the court rules in favor of taxpayers.