Can I file and suspend my SS in May 2019 and still get benefits for my daughter(11/17/2001)
who will be in High School until may 2020?
No. If you voluntarily suspend your benefits any time after April 29 2016, no benefits can be paid to any beneficiaries on your record other than divorced spouses (https://www.ssa.gov/planners/retire/suspendfaq.html). You would have to actually be drawing your benefits in order for your daughter to be paid child benefits on your record.