Blood plasma is filtered in the renal tubule renal corpuscle renal capsule renal column renal calyx

Blood plasma is filtered in the capillaries of the glomerulus. Glomerulus is  a cluster of nerve endings, spores, or small blood vessels around the end of a kidney tubule. So, blood plasma is filtered in the renal tubule.
The blood it is filtered by the first section of the functional unit of your kidneys, the nephron. The nephron is the first section of each individual nephron is called the renal corpuscle and is made up of the glomerulus, 

Cotton was the very first