You must file Form TD F 90-22.1 if you had any financial interest in, or signature or other authority over, a bank, securities, or other financial account in a foreign country. You do not need to file the report if the assets are with a U.S. military banking facility operated by a U.S. financial institution or if the combined assets in the account(s) are $10,000 or less during the entire year.
More information about the filing of Form TD F90.22-1 can be found in the instructions on the back of the form.taxmap/pubs/p54-004.htm#en_us_publink1000221097
Form 105, Report of International Transportation of Currency or Monetary Instruments, must be filed by each person who physically transports, mails, ships, or causes to be physically transported, mailed, or shipped into or out of the United States, currency or other monetary instruments totaling more than $10,000 at one time. Form 105 must also be filed by certain recipients of currency or monetary instruments.
More information about the filing of Form 105 can be found in the instructions on the back of the form.