Not being a plumber I've always used what was shown to me to cut PVC... a saw of some type or another. It's messy, leaves static shavings everywhere, and sometimes ruins the pipe edge so you have to clean burs (chamfering, which you may want to do anyway).
Better alternative: Ratcheting Cutter, cuts like butter, clean cut, fast, pretty inexpensive.
https://www.amazon.com/dp/B07RJLTQLY/ref=cm_sw_r_sms_apa_i_z8keEbGFTTA36
Existing plumbing in a tight space... use a string! Fast, less mess than a hacksaw, not as clean of a cut as a miter saw.
https://www.amazon.com/dp/B0058I3SQW/ref=cm_sw_r_sms_apa_i_RgleEbFTGMY6F

Better alternative: Ratcheting Cutter, cuts like butter, clean cut, fast, pretty inexpensive.
https://www.amazon.com/dp/B07RJLTQLY/ref=cm_sw_r_sms_apa_i_z8keEbGFTTA36
Existing plumbing in a tight space... use a string! Fast, less mess than a hacksaw, not as clean of a cut as a miter saw.
https://www.amazon.com/dp/B0058I3SQW/ref=cm_sw_r_sms_apa_i_RgleEbFTGMY6F


