- March 17 deadline for specific communications with the Tax Agency
- March 17 deadline for payment of substitute taxes, Tobin taxes, withholding taxes, VAT for February, and VAT payments from split payments
- March 31 deadline to pay certain taxes and file declarations related to substitute taxes, VAT on intra-community purchases, and rental contract registration taxes
Source: news.bloombergtax.com
Note that this post was (partially) written with the help of AI. It is always useful to review the original source material, and where needed to obtain (local) advice from a specialist.