The best time for NIPT (Non-Invasive Prenatal Testing) is 10 weeks into your pregnancy. If you are planning to have a NIPT test, it's best do it as soon as possible after you've passed the 10-week mark.

NIPT (Non-Invasive Prenatal Testing) is a screening test that aims to determine whether an unborn baby has chromosomal abnormalities that are likely to result in genetic conditions like Down's syndrome, Edwards' syndrome or Patau's syndrome.
More...

An ultrasound scan is a medical procedure that’s used to examine unborn babies while they’re still in the womb.
More...