When I turned the key on my harley it started clicking?

Most likely a short in the starter button itself, a squirt of WD 40 should be all it needs but it may need additional attention.

Harleys use circuit breakers rather than one time fuses. Does anything else electrical function? If not, it could be a relay clicking on and off and not the starter relay. My buddy had that happen one time and I found a wire inside the headlight shell that had the insulation worn through, causing a short.

The 2 other answers are on the right track but MORE info is needed...."my harley clicks".....doesnt say much.

Always give year, make and model and detailed decription of noise, what it sounds like, where does it come from etc

that is the starter relay making contact - so everything works down to that point.

after that everything could be suspect.

Lack of battery power

connection from battery to relay to starter suspect

relay (switch) power side suspect

starter motor dead

engine seized

earth from battery to relay to earth on frame or starter earth suspect

check that there are not other interventionist switches eg side stand up, clutch in, kill switch on,

A2