Huff post made a list that ranked artists according to the sizes of their vocal ranges. Taylor is almost at the very bottom. The only one below her is Luke Bryan with only 2 octaves. The articles says that Taylor's range is E3-F#5, which is correct (although she has gone down to D3 several times, both studio and live), hitting the E3 in Begin Again (maybe...I don't think there were E3s in Begin Again) and the F#5 in You Belong With Me (DEFINITELY NOT. There are no F#5s in You Belong With Me. The only time Taylor hit that note was on SNL during her impersonation of Shakira ). You can see the list here.
It's ok though
It's not your range but how you use it hence why lorde is higher than Whitney Houston.