Hi hieuabc,
When the At-home GMAT was initially introduced, there were some Test-takers who faced lengthy delays before they received their Official Scores. At this point though, most people who take the At-home Exam receive their Score in 2-7 days (although there are still incidents of people not receiving their Scores until later than that. There have been plenty of GMATers who have written about their experiences as well - and you can read through them in the Shared Experience forum here:
https://gmatclub.com/forum/share-gmat-experience-8/From your initial post, it's not clear how you've been studying so far (or if you're just beginning), so it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How long have you studied?
2) What study materials have you used so far?
3) On what dates did you take EACH of your CATs/mocks and how did you score on EACH (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
4) What is your overall goal score?
5) When are you planning to take the GMAT?
6) When are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich