Double-check your tax number and password for typos. The system locks access after multiple failed attempts, usually for 30 minutes. If you forgot your password, use the recovery option on the login page. Make sure your browser accepts cookies from impots.gouv.fr domain, as the portal requires them for authentication. Clear your browser cache if the login page keeps refreshing without letting you in.
Check that your bank account has sufficient funds and that your daily transfer limit hasn''t been reached. Payments on the portal sometimes fail if your browser session expires during the transaction. Start fresh by logging out completely and initiating the payment again. Verify that the reference number and payment details match your tax notice exactly, as any mismatch will trigger an automatic rejection.
PDF files from the portal require Adobe Reader or a compatible viewer. If downloads start but never finish, your antivirus might be blocking them. Add the DGFiP domain to your security software''s whitelist. Right-click the download link and choose ''Save as'' instead of opening directly in the browser. Check your Downloads folder, as files sometimes save without notification.
The portal times out after 20 minutes of inactivity. If you''re filling out a complex form, save your progress regularly using the designated button. Don''t use the browser''s back button while working on forms, as this corrupts the session data. If you see a technical error code, note it down and try submitting again after clearing your cookies specifically for impots.gouv.fr.