If I understand you correctly, you're currently studying applied xyzzyxian frobnification* at Foobar University Extension School* in Barville, XZ* since 201X*, which will eventually earn you an M.Sc.** in frobnification science* from Foobar University* in Footown, XZ* when you graduate in 201Y* or thereabouts. Once you've graduated, you'd list your degree in your rèsumè as something like:
M.Sc. (frobnification science), Foobar University (Footown, XZ), 201Y
However, you'd like to apply for work while studying, and you're wondering how to describe your ongoing studies in your current rèsumè.
If so, the direct answer is: any way you like, as long as it's factually correct to the best of your knowledge.
For instance, you'd be perfectly fine listing it simply as:
Ongoing studies: M.Sc. (frobnification science), Foobar University (Footown, XZ), 201Y (planned)
However, if you're looking for work in a field related to your studies, it's quite plausible that your prospective employers might be interesting in knowing a bit more about your studies than just the fact that you'll hopefully have a diploma some day. As such, you could also consider fleshing out the entry to something like, say:
Ongoing studies: M.Sc. in frobnification science (applied xyzzyxian frobnication) at Foobar University Extension School, Barville, XZ (part of Foobar University, Footown, XZ), 201X–201Y (planned)
You could, if you wanted, even include details about any minor subjects you're studying, if you feel they might be relevant, and maybe your current GPA or any other relevant academic performance metrics.
The important questions to ask yourself, with regard to any extra pieces of information are:
- might the/a prospective employer care about this detail, and
- if yes, would including it give a favorable impression (or save you from embarrassment later)?
For example, if you're applying for a job as a xyzzyxian frobnicator*, you should definitely mention that that's the specific subject you're studying. If you're applying for work as a grocery store clerk, and doubt your employer would know a frobnicator* from a fnord*, leave it out.
Similarly, might your future employer care that you're studying at Barville*, rather than at the main Footown* campus, e.g. because the job you're applying for is located a lot closer to Barville*? If so, do mention it. If not, you could leave it out (but it probably won't hurt to mention it anyway).
Ps. The same general principle also applies after you've graduated. Sure, 10 years after graduation, nobody's going to care about your degree beyond the fact that you have it (because by then, you should have some relevant work experience and/or a further degree to demonstrate your skills), so you don't want to waste too much space on it. But if you're applying for work straight after graduation, then your studies will be, for the time being, the most relevant part of your rèsumè, so they deserve some extra detail.
*) Placeholders for unknown major / institute / town / year / etc.
**) Or maybe a B.Sc. or a Ph.D. or some other degree.