@oboero2 , thank you for your response
Let me Clarify :
SAR is raised by your US bank on any foreign transfers ( in or out ) and dealt with by the bank. You do not have any action here
FBAR regs come into play for any Finacial accounts that you own and/or have signature authority. Thus if you have a Foreign account or by virtue of inheritance , you become the owner/signatory of your Parent's bank account, you will need to file a form 114 ( FBAR at FinCen.gov -- it is only on-line filing , due date same as return filing date )
Form 3520 is filed directly to IRS ( download the form from www.irs.gov and it shows the address where it should be mailed ) -- not part of your return . Any time you receive =>US100,000 from a Foreign person / Estate / Trust, you must file this form. No tax implication.
Form 8938 -- FATCA form covers all other foreign assets ( liquid and semi-liquid ) , except for real=estate and needs to filed along with your return. Again it generally has NO tax implications.
I hope this answers your query. In case you have more questions on this please feel welcome to add to this thread and I will circle back
