Tackle twill is made out of polyester and is typically decorated using sublimation.
dtg inks do not adhere to polyester (snythetic) fibers - only natural fibers. You can try to use different types of pretreatments and it might work depending on what the twill is going on. If it is not going to be washed, you could try a double pass at a low volume of ink.
Best thing you can do is a try a sample print.
Mark