{"id":30053,"date":"2026-04-16T09:53:03","date_gmt":"2026-04-16T09:53:03","guid":{"rendered":"https:\/\/desarrollo.martinezcaballeroabogados.com\/uncategorized\/30053\/"},"modified":"2026-04-16T21:13:14","modified_gmt":"2026-04-16T21:13:14","slug":"30053","status":"publish","type":"post","link":"https:\/\/martinezcaballeroabogados.com\/en\/uncategorized\/30053\/","title":{"rendered":"2025 Income Tax Return: Dates, How to File, and What You Need"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"30053\" class=\"elementor elementor-30053 elementor-30049\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2b5e192d e-flex e-con-boxed e-con e-parent\" data-id=\"2b5e192d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1220104e elementor-widget elementor-widget-text-editor\" data-id=\"1220104e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h1 class=\"wp-block-heading\">2025 Income Tax Return: Dates, How to File, and What You Need<\/h1>\n<p><\/p>\n<p>With the arrival of April, one of the most important times of the year begins from a tax perspective: the&nbsp;<strong>2025 income tax return campaign<\/strong>. Every year, thousands of taxpayers make mistakes that can lead to penalties, surcharges, or financial losses due to incorrectly applying deductions. <\/p>\n<p><\/p>\n<p>In this article, we clearly explain <strong>when the 2025 income tax return is filed, how you can file it, and what documentation you need<\/strong>, so that you can avoid issues with the Tax Agency.<\/p><p><br><\/p>\n<p><\/p>\n<p><\/p>\n<h2 class=\"wp-block-heading\">When to File the 2025 Income Tax Return?<\/h2>\n<p><\/p>\n<p>The deadline to file the income tax return begins on <strong>April 8 and ends on June 30<\/strong>.<\/p>\n<p><\/p>\n<p>It is important to note that this return pertains to income and tax data for the year 2025.<\/p>\n<p><\/p>\n<p>If you do not file the return on time, the Tax Agency may apply:<\/p>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><\/ul>\n<\/li>\n<\/ul>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>surcharges<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>late payment interest<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>financial penalties<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<p><\/p>\n<p>In addition, if the result is payable, the deadline to set up direct debit for the payment ends on <strong>June 25<\/strong>.<\/p><p><br><\/p>\n<p><\/p>\n<p><\/p>\n<h2 class=\"wp-block-heading\">How to File Your 2025 Income Tax Return: Online, Phone, or In Person<\/h2>\n<p><\/p>\n<p>There are several ways to file the return:<\/p>\n<p><\/p>\n<p><strong>Online<\/strong><b><br><\/b>Available from April 8 to June 30. This is the fastest and most frequently used option. <\/p>\n<p><\/p>\n<p><strong>By phone<\/strong><b><br><\/b>Available from May 6 to June 30. Advance appointment booking is required from April 29. <\/p>\n<p><\/p>\n<p><strong>In Person<\/strong><br>From June 1 to June 30, also by appointment (from May 29).<\/p>\n<p><\/p>\n<p>Choosing one option or another will depend on the complexity of your tax situation. In many cases, having professional advice can prevent significant errors. <\/p><p><br><\/p>\n<p><\/p>\n<p><\/p>\n<p><\/p>\n<h2 class=\"wp-block-heading\">Review Your Tax Data Before Filing Your Return<\/h2>\n<p><\/p>\n<p>Before confirming the draft return, it is essential to review the&nbsp;<strong>tax data held by the Tax Agency<\/strong>. This data is not always complete and may contain errors. <\/p>\n<p><\/p>\n<p>It is common for the following to be missing:<\/p>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><\/ul>\n<\/li>\n<\/ul>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>additional income<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>aid or subsidies<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>regional deductions<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>cryptocurrency transactions or investments<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<p><\/p>\n<p>The final responsibility always lies with the taxpayer, not the Tax Agency.<\/p><p><br><\/p>\n<p><\/p>\n<p><\/p>\n<h2 class=\"wp-block-heading\">What Documents Do You Need to File Your 2025 Income Tax Return?<\/h2>\n<p><\/p>\n<p>Although the Tax Agency already has a lot of information, it is advisable to have the following at hand:<\/p>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><\/ul>\n<\/li>\n<\/ul>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>ID (DNI) and personal data<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>bank account number (IBAN)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>company income certificate<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>property information (IBI, cadastral references, rentals)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>proof of purchase or sale of shares, cryptocurrencies, or properties<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>investment fund certificates<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>proof of aid or subsidies<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>receipts or documents that allow for deductions<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<p><\/p>\n<p>Having all this documentation organized can make the difference between overpaying or correctly optimizing your return.<\/p><p><br><\/p>\n<p><\/p>\n<p><\/p>\n<p><\/p>\n<h2 class=\"wp-block-heading\">Common Errors in Income Tax Returns<\/h2>\n<p><\/p>\n<p>Every year we see the same errors:<\/p>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\"><\/ul>\n<\/li>\n<\/ul>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>not reviewing the draft<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>not declaring secondary income<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>forgetting deductions<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<ul class=\"wp-block-list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"wp-block-list\">\n<li>not updating personal or family situation<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><\/p>\n<p><\/p>\n<p>A small error can lead to a review by the Tax Agency.<\/p><p><br><\/p>\n<p><\/p>\n<p><\/p>\n<p><\/p>\n<h2 class=\"wp-block-heading\"><span style=\"font-family: \"Antipasto Bold\", sans-serif; text-align: var(--text-align); letter-spacing: 0.9px; word-spacing: 0em;\">Do You Need Help with Your 2025 Income Tax Return?<\/span><br><\/h2>\n<p><\/p>\n<p>At <b>Mart\u00ednez<\/b> <b>&amp;<\/b> <b>Caballero<\/b> <b>Abogados<\/b><strong> <\/strong>we help individuals, self-employed professionals, and businesses file their income tax return correctly, avoiding mistakes and optimising the outcome.<\/p>\n<p><\/p>\n<p>If you want to ensure your return is correctly prepared or need advice, you can contact our team, and we will study your case individually.<\/p>\n<p><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>2025 Income Tax Return: Dates, How to File, and What You Need With the arrival of April, one of the most important times of the year begins from a tax perspective: the&nbsp;2025 income tax return campaign. Every year, thousands of taxpayers make mistakes that can lead to penalties, surcharges, or financial losses due to incorrectly [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":30062,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[881],"tags":[],"class_list":["post-30053","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>2025 Tax Return<\/title>\n<meta name=\"description\" content=\"Find out how to file your 2025 tax return: deadlines, required documents, and mistakes to avoid to prevent issues with the Tax Authority.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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