Anyone know where I can find an ATM that takes Euro deposits?
I know there are some that accept USD and JPY, not sure about Euro.
Where did you even find USD and JPY? 
CTBC has ATM vestibules that let you take out and deposit those currencies.
Several Taishin ATMs do this. I gotta take a pic next time i run past one.
EUR never saw it here besides the airport FX ATMs of Mega, maybe also BoT there, but not 100% sure.
Most bigger branches of major local banks (Esun, Cathay, Taishin, CTBC, Mega, BoT) have a FX ATM where at the bare minimum USD and JPY are offered for withdrawal (from NTD if you don’t have sufficient balance in that specific currency, otherwise they take directly the foreign currency)
I’ve seen ATMs that provide withdrawals of high-profile foreign currencies (USD, JPY, etc).
Depositing though . . . that’s not somethign I’ve seen.
Guy