Find out about tax penalties for Land Transaction Tax (LTT) and Landfill Disposal Tax (LDT), how they're calculated and what you can do.
Dewch i wybod am gosbau treth ar gyfer Treth Trafodiadau Tir a Threth Gwarediadau Tirlenwi, sut maen nhw'n cael eu cyfrifo a beth allwch chi ei wneud.