Law 40 of 2013, the Tax Burden Redistribution and Adjustment Act (Ley de redistribución y ajuste de la carga contributiva), substantially amended the alternative minimum tax (AMT) for companies. AMT base The highest amount between the regular tax and the following AMT base applies: -   30% of the AMT income (increased from 20%) and the amount of the additional gross receipts tax applicable; or -   20% of payments to a related party (i.e. value of purchases from related parties, including transfers from the home office to branches of foreign corporations doing business in Puerto Rico) if such amounts...