Cops confronted Amanda Bynes outside a retirement community after she got into an argument with a cab driver Sunday night. According to the cab driver ... Amanda was trying to get into an old folks home in Thousand Oaks -- outside L.A. -- when management at the place turned her away because they felt she was drunk and accused her of trespassing. However, the retirement community was nice enough to call a taxi for Amanda -- but when she got into the cab she said ... "Get me the f**k out of here ... I don't have any money." Naturally, the driver kicked her out at that point. We're told Amanda walked back toward the retirement community ... and that's when cops were called.