GDC data portal cancer subtype
I personally find the GDC portal not very user-friendly. However, some of the data is available from other sources. For example, you can download TCGA-BRCA FPKMs and phenotypes from UCSC Xena here: https://xenabrowser.net/datapages/?cohort=GDC%20TCGA%20Breast%20Cancer%20(BRCA)

All the sample info is already combined and the labels are the classic TCGA barcodes.