Hi, I have an old friend who held a green card and worked in the US back in the 1980s. I have been encouraging him to look into his potential SS benefits as I’m sure he’d qualify for a benefit under totalization agreement and also based on his US ex wife’s SS record. The fly in the ointment is that I believe he simply left the US, allowed his Greencard to lapse without actually renouncing it, and didn’t ever file US taxes after he left the USA. I’m pretty sure when applying for SS one of the questions is regarding being up to date on US taxes, I have no idea what his position is on this given he didn’t formally give up his GC and hasn’t files taxes, but hasn’t resided in the US for 25 years. Obviously he doesn’t want to open a massive can of worms with the IRS, but I suspect he could be eligible for a significant benefit. Anyone got any insights?