Is my japanese correct?

Just wondering if what I have written is correct:

PayPal口座に入金することが米国銀行のみ可能そうです。。。

こちらの銀行から円で送金できますから、「三菱東京UFJ銀行」の方がいいでしょうか?

Are you trying to say:
I have been told that remittance into a PayPal account is possible only from a US bank.
I can send in Yen from the bank on this side, so "Bank of Tokyo-Mitsubishi UFJ" is better?

I could decipher that, but you are missing "from" in the first sentence. I would suggest:
PayPal口座に入金できるののは、米国の銀行からのみだそうです。

Apart from translation: I guess you are trying to pay someone in Japan, and you are in Japan too? Then a local bank would be far easier.