how can i delete my balance.i have 0.05$

Ask Support to zero balance your account.

Get Support -

https://getsupport.apple.com/

M1 Mac mini, macOS 11.5.1; Watch, series 5 GPS/cellular, watchOS 7.6.1; iPad Pro 2nd Gen, iPadOS 14.7.1; iPad Air 2, iPadOS 14.7.1; iPhone 12 Pro, iOS 14.7.1; TV 4th Gen, tvOS 14.7  HomePods, audioOS 14.7 and Airport Express w/ Airplay 2

Hi altangerel018,

Welcome to the Apple Community

? Add enough to it to buy a song on iTunes ?

Would that help :)