All the mainland and Taiwan dictionaries that I’ve come across give 幺 [jiu1] as the standard form. There is no simplified version.
However, 么 could be used as an uncommon variant of 幺 although 么 is mostly used as the simplified form of 麼 [mo1].
However, 么 could be used as an uncommon variant of 幺 although 么 is mostly used as the simplified form of 麼 [mo1].