Thank you so much for helping!
I currently have my citizenship n-400 pending (estimated approval date July 2018 according to uscis online estimator. applied July 2017)
I am currently an LPR (filed for ROC, but was eligible to file for n-400 before ROC got settled)
Once citizenship is approved, I plan on petitioning for my mom (around 1 year wait time)
Then, once my mom gets her green card, she wants to petition my younger sister
The problem is, my sister's date of birth if Dec 1997, so she will be 21 on Dec 2018
If I get my citizenship July 2018 and it takes my mom 1 year to get her green card, it would be July 2019 before she could even petition for my sister (and she would already be 21.5 years old)
If I file for my mom under my LPR status right now, is it possible that she might get approved sooner than July 2019?
Are there any other options I'm missing?
My sister has autism. Otherwise she would have H1-B as an option like my brother who is now 25