I want to replace (I want to renew the quality) checkbox to add.

It's often when users have the coin / note but want to renew the quality (for example to increase the grade from VF to UNC or so)
Could it be possible to add the third checkbox with the text like: I want to replace this coin or I want to upgrade the quality of this coin 

Would be great to have such option.

Would it be possible to do this for individual years even? I know uCoin has a button you can just press to add the tag that you want to replace a specific coin.

Foxtrot Lírio

Would it be possible to do this for individual years even? I know uCoin has a button you can just press to add the tag that you want to replace a specific coin.

That (option to operate per year / variety) was already aksed a few times previously. Unfortunately it's too complicate to implement that technically was the last verdict as I remember. May be one fine day in the future. But for KM# to have such a checkbox would be already the great upgrade. Lets' see…