Home2011 Treaties and Agreements ...Panama (11-418.1) – Agreement for Tax Cooperation and the Exchange of Information Relating to Taxes hide Panama (11-418.1) – Agreement for Tax Cooperation and the Exchange of Information Relating to Taxes TIAS Office of Treaty Affairs April 18, 2011 Taxation: Information Exchange Agreement signed at Washington November 30, 2010; entered into force April 18, 2011. With exchange of notes. Download attachment [2 MB] Tags Panama Taxation Treaties