@rsudol , assuming that you are a US person (citizen/ GreenCard ) and having a tax home in Brazil. incomes that are taxed by both US and Brazil come under the "double taxes " amelioration as follows :
(a) for passive income taxes up to USA$300 per filer ( thus US$600 for a joint filer ) can be availed of ( as safe harbor ) without having to file a form 1116 -- just tell TurboTax ( under Deductions and Credits tab ) that you have foreign taxes to recognize.
(b) if the amount of foreign taxes paid is greater than the safe harbor amount above, then one can either use it as a deduction under State & Local Taxes ( SALT ) on schedule-A but herein SALT limitation applies
(c) Or one can use form 1116 to claim foreign tax credit ( under Passive income ) but here while the full amount is recognized , the amount allowed for the tax year depends on a ratio of Foreign income to World income. The unallowed amount is carried back for a year or forward till extinguished.
I hope I have answered your query ( even though in a roundabout way . Is there more I can do for you ?
pk
