ECO summarises monthly tax and reporting obligations for companies and households, noting invoicing rules under Model 10 (Modelo 10) and a March 2 deadline for the IRS Model 37 (Modelo 37) declaration listed by EContas. The piece is a reminder that businesses and families must keep on top of multiple filings this month to avoid penalties. Taxpayers and business owners should check the full EContas checklist and their AT online account for specific deadlines.
Model 10 invoicing and March tax deadlines
Monday, 2 March 2026AI summary
Context & Explainers
Model 37 (Modelo 37) is an IRS tax declaration filed with the Tax and Customs Authority (AT) as part of monthly reporting obligations; the article notes its submission deadline falls on March 2. Companies and households should confirm with their accountant or the AT whether they must file it and meet the deadline to avoid penalties.
